Explain which ions cause the different colours of the solution Magnesium Chloride + Water

Answers

Answer 1

Answer:

Explanation:

Magnesium chloride is a compound composed of magnesium and chlorine ions. When it is dissolved in water, it dissociates into its constituent ions, which are surrounded by water molecules.

The color of the solution depends on the presence of any other ions that may be present. In the case of magnesium chloride, it is colorless in its pure form, and the color of the solution is determined by the presence of the chloride ions.

When the solution is dilute, it appears colorless. As the concentration of chloride ions increases, the color of the solution changes from light green to deep green, and finally to brownish-red. The intensity of the color is proportional to the concentration of chloride ions present.

The color change is due to the interaction between the chloride ions and the water molecules surrounding them, which absorb specific wavelengths of light. This absorption causes the solution to appear colored to the human eye. Therefore, the different colors observed in the solution of magnesium chloride and water are due to the presence of chloride ions and the concentration of these ions.

Answer 2

Answer:

Magnesium chloride dissolves in water to give a faintly acidic solution (pH = approximately 6).

The appearance of this reaction or solution is a bright white powder (in the picture)

The ion which makes this white powdery figure for magnesium chloride are salts that are highly soluble in water, for example: sodium ion (Na+).

Explain Which Ions Cause The Different Colours Of The Solution Magnesium Chloride + Water

Related Questions

Directions: Balance the following chemical equations. Descriptions of the equation, physical states, and atoms that are ions (have a
positive or negative charge) have absolutely no effect on balancing. The problems at the very end with a "**" are extremely difficult.
They are far more difficult thaN the problems that will appear on your test of final exam. Give them a try if you like a challenge or have
extra time in class
1) 2 C2H6(g) + 7 O2(g)  4 CO2(g) + 6 H2O(g)
2) 2 NaN3(s)  2 Na(s) + 3 N2(g)
3) 6 Na + Fe2O3  3 Na2O + 2 Fe
4) 3 Mg(s) + N2(g)  Mg3N2(s)
5) 2 Na + 2 NH3  2 NaNH2 + H2
6) Na2O + 2 CO2 + H2O  2 NaHCO3
7) P4S3(s) + 6 O2(g)  P4O6(g) + 3 SO2(g)
8) 2 Na3PO4 + 3 CaCl2  Ca3(PO4)2 + 6 NaCl
9) 2 C8H18(l) + 25 O2(g)  16 CO2(g) + 18 H2O(g)
10) C2H6O(l) + 3 O2(g)  2 CO2(g) + 3 H2O(g)
11) Pb(NO3)2 + 2 KI  PbI2 + 2 KNO3
12) 2 N2O5  4 NO2 + O2
13) 2 KClO3(s)  2 KCl(s) + 3 O2(g)
14) 2 CO(g) + O2(g)  2 CO2(g)
15) 2 C57H110O6(s) + 163 O2(g)  114 CO2(g) + 110 H2O(l)
16) 6 Na + 2 O2  2 Na2O + Na2O217) 2 Al + 3 H2SO4  Al2(SO4)3 + 3 H2
18) 2 C7H10N + 21 O2  14 CO2 + 10 H2O + 2 NO2
19) 2 Al(OH)3 + 3 H2SO4  Al2(SO4)3 + 6 H2O
20) 3 BaO + 14 Al  3 BaAl4 + Al2O3
21) 2 AgN3(s)  3 N2(g) + 2 Ag(s)
22) Pt + 4 HNO3 + 6 HCl  H2PtCl6 + 4 NO2 + 4 H2O
23) 2 LuCl3 + 3 Ca  2 Lu + 3 CaCl2
24) XeF6 + 3 H2O  XeO3 + 6 HF
25) Ba2XeO6 + 2 H2SO4  2 BaSO4 + 2 H2O + XeO4
26) P4O6 + 6 H2O  4 H3PO3
27) 2 C6H14(l) + 19 O2(g)  12 CO2(g) + 14 H2O(g)
28) 2 MoS2 + 7 O2  2 MoO3 + 4 SO2
**22) 2 K2MnF6 + 4 SbF5  4 KSbF6 + 2 MnF3 + F2
**23) S + 6 HNO3  H2SO4 + 6 NO2 + H2O
**24) 3 Cu + 8 HNO3  3 Cu(NO3)2 + 2 NO + 4 H2O
**25) CuS + 8 HNO3  CuSO4 + 8 NO2 + 4 H2O
**26) Cu2S + 12 HNO3  Cu(NO3)2 + CuSO4 + 10 NO2 + 6 H2O
**27) 5 NaBr + NaBrO3 + 3 H2SO4  3 Br2 + 3 Na2SO4 + 3 H2O
**28) 48 KNO3 + 5 C12H22O11  24 N2 + 36 CO2 + 55 H2O + 24 K2CO3

Answers

The chemical equations shown in the question are already balanced. It can be said to be balanced if the number of atoms of each element involved in the reaction is equal to the number of atoms of the same element in the product of the reaction.

The Balancing method

The Balancing method is used to balance chemical equations. Here are the steps involved in balancing chemical equations:

Step 1: First write down the unbalanced chemical equation.Step 2: Next, start balancing the elements that appear in the equation.Step 3: Begin by adding a coefficient to one of the elements on one side of the equation.Step 4: In order to balance the equation, the coefficient will then have to be added to other elements on the same side of the equation.Step 5: Finally, when the elements on the left and right sides of the equation are equal, then the equation is balanced.The equation is now balanced if the number of atoms of each element in the reactants is equal to the number of atoms of the same element in the products after balancing.

learn more about balanced chemical equations

https://brainly.com/question/26694427

#SPJ11

the principles which underlie balancing chemical equations include

Answers

The principles that underlie balancing chemical equations include the law of conservation of mass and the concept of stoichiometry.

The law of conservation of mass states that matter can neither be created nor destroyed in a chemical reaction, meaning that the total mass of the reactants must be equal to the total mass of the products. This principle requires that the number of atoms of each element on the reactant side of the equation must be equal to the number of atoms of that element on the product side. The concept of stoichiometry involves using the balanced equation to determine the quantitative relationships between the reactants and products, including the amounts of each substance involved in the reaction.

To know more about stoichiometry, here

brainly.com/question/9743981

#SPJ4

--The complete question is, The principles that underlie balancing chemical equations include the______________ and the concept of stoichiometry. ---

Balance the equation. H3PO4 → H4P₂O7 +
H₂O

Answers

Answer:

2,1,1  

Explanation:

What do an engine using gasoline to power a car and
mixing glue and laundry powder to create putty have in commen

Answers

An engine using gasoline to power a car and mixing glue and laundry powder to create putty are both examples of chemical reactions.

Gasoline is considered an energy source due to its ability to release stored chemical energy in the form of heat and mechanical work when it is burned in an engine. When gasoline is ignited in an engine, the chemical energy stored in its molecular bonds is released, causing a rapid combustion reaction that generates heat and expanding gases that push the pistons and create mechanical work.

The energy content of gasoline is typically measured in units of joules or British thermal units (BTUs), which are used to quantify the amount of energy released during combustion. Gasoline is a widely used and important energy source, but its combustion also produces harmful emissions that contribute to air pollution and climate change.

To learn more about Gasoline visit here:

brainly.com/question/29991915

#SPJ4

What are the ang and In the actua molecule of which this Lewis structure? Note for advanced students: give the ideal angles; and don't worry about small differences from the ideal that might be caused by the fact that different electron groups may have slightly different sizes

Answers

The actual molecule for this Lewis structure is BeF2 (Beryllium Fluoride). The ideal angle of the molecule is 180°. This is because the two Fluorine atoms have single bonds to the Beryllium atom, and two single bonds always form a linear shape. The bond angle is 180° in linear molecules.

The angles in the actual molecule of which the given Lewis structure is for can be determined by looking at the VSEPR theory. According to VSEPR theory, the shapes of the molecules are determined by the number of electron groups surrounding the central atom. The electron groups can be either bonding or non-bonding, and they repel each other, which results in the formation of a particular shape or geometry.

The ideal angles of the molecules are as follows:Linear shape: 180 degrees Trigonal planar shape: 120 degrees Tetrahedral shape: 109.5 degrees Trigonal bipyramidal shape: 120 degrees (equatorial) and 90 degrees (axial)Octahedral shape: 90 degrees.The actual angles may deviate slightly from the ideal angles due to the fact that different electron groups may have slightly different sizes. This is known as the lone pair-bond pair repulsion. It is important to note that the actual angles of the molecule depend on the type of bonding that takes place between the atoms of the molecule.

More on Lewis structure: https://brainly.com/question/12476602

#SPJ11

WHAT IS THE MASS OF O2 GIVEN THE EQUATION: 4FE + 3O2 --> 2FE2O3

Answers

Answer: I think its 111.6

Explanation:

Preparations of lead compounds and percentage yield

Answers

A chemical substance or natural product known as a lead compound has biological action against a pharmacological target.

A critical phase of the drug discovery program is lead identification and optimization.

There are two main oxidation states for compounds containing lead: +2 and +4. The first is more typical. Strong oxidants or only occurring in extremely acidic conditions are typical characteristics of inorganic lead(IV) compounds.

The percent yield equation is:

percent yield = actual yield/theoretical yield x 100%

The ratio of the actual yield to the theoretical yield multiplied by 100 is the percent yield.

Characterizing natural products, using combinatorial chemistry, or using molecular modeling as in rational drug design are methods for finding lead compounds. Lead compounds can also be made from substances that high-throughput screening identified as hits.

To know about yield

https://brainly.com/question/2506978

#SPJ4

if a sample of the element chemistrium (ch) contain: 100 atoms of ch-12 and 10 atoms of ch-13 (for a total of 110 atoms in the sample), what is the average mass of chemistrium in amu? a 12.1 b 12.3 c 12.5 d 13.1 e 13.3 f 13.5

Answers

The average mass of chemistrium (Ch) in amu is: 12.5 amu.

What is chemistrium (Ch)?

Chemistrium is an element with the atomic number 106. It is a transactinide synthetic element with an atomic weight of 268 u. Until 2009, this element was known as unnilhexium (Unh). It was named chemistrium in honor of the chemistry in recognition of the Moscow-based Joint Institute for Nuclear Research's contributions to the synthesis of new elements.

If a sample of the element chemistrium (Ch) contains 100 atoms of Ch-12 and 10 atoms of Ch-13 (for a total of 110 atoms in the sample), the average mass of chemistrium in amu can be calculated as follows:

Average mass of Ch = [(number of atoms of Ch-12 x atomic weight of Ch-12) + (number of atoms of Ch-13 x atomic weight of Ch-13)] / Total number of atoms of Ch= [(100 x 12.000000) + (10 x 13.003355)] / 110= [1200.0000 + 130.03355] / 110= 1330.03355 / 110= 12.18212318 amu, which is rounded off to 12.5 amu.

Learn more about element: https://brainly.com/question/25608430

#SPJ11

You observed a phase change of liquid iodine that has a negative ΔH value. Which of the following statements are true? (Assume constant pressure and a flexible container.)(You may select more than one answer. Incorrect answers will be penalised.)Question 4 options:A. It was an exothermic reaction.B. Energy was transferred from the system to the surroundings.C. q is positive.D. The liquid became a gas.

Answers

The statements which are true include: it was an exothermic reaction and energy was transferred from the system to the surroundings. Thus, the correct options are A and B.

What is an Exothermic reaction?

The reason for this reaction to be an exothermic reaction is that a negative ΔH value represents that the reaction or process was exothermic and as per the first law of thermodynamics, energy can neither be created nor destroyed, it only changes form from one form to another.

In this case, as the reaction is exothermic, it releases energy which was transferred from the system to the surroundings. Hence, the correct options will be A and B. The options C and D are incorrect options. The value of q is negative in this case, and the liquid would have become a solid instead of a gas, considering that there is no change in pressure or flexible container is used.

Learn more about Exothermic reaction here:

https://brainly.com/question/10373907

#SPJ11

phosphorylation of either of the terminal hydroxyl groups of glycerol will create: (a) (r)-glycerol-3-phosphate (b) l-glycerol-1-phosphate (c) d-glycerol-3-phosphate (d) a pair of enantiomers (e) none of the above

Answers

Phosphorylation of either of the terminal hydroxyl groups of glycerol will create b. L-glycerol-1-phosphate.

Glycolysis is a metabolic pathway in which glucose is broken down into two pyruvates in the presence of oxygen. Glycerol is a molecule that serves as a precursor to triacylglycerols and phospholipids. Glycerol, which is a 3-carbon molecule, is broken down into dihydroxyacetone phosphate and glyceraldehyde 3-phosphate in the glycolysis pathway.

The structure of glycerol comprises of two terminal hydroxyl groups, -OH, on carbons 1 and 3 of glycerol are the primary alcohol groups. These groups can be phosphorylated by a kinase enzyme to produce two different phosphates: L-glycerol-1-phosphate or D-glycerol-3-phosphate.

Phosphorylation of either of the terminal hydroxyl groups of glycerol will create L-glycerol-1-phosphate. This molecule is a phosphoric acid ester of glycerol that is classified as a glycerophosphate. Phosphorylation of the 1-hydroxyl group produces L-glycerol-1-phosphate, whereas phosphorylation of the 3-hydroxyl group produces D-glycerol-3-phosphate.

Therefore, the phosphorylation of either of the terminal hydroxyl groups of glycerol will create L-glycerol-1-phosphate.

To know more about phosphorylation click here:

https://brainly.com/question/15585148

#SPJ11

Explain the following statement about the rate law equation: The rate constant isn't really
constant. Include the definition of the term rate constant in your answer and give two
specific examples to support this statement.

Answers

Answer:

In chemical kinetics, the rate constant (k) is a proportionality constant that relates the rate of a chemical reaction to the concentrations of the reactants. It is often included in the rate law equation, which expresses the relationship between the rate of the reaction and the concentrations of the reactants.

However, the rate constant is not truly constant because it can vary with different experimental conditions. The rate constant is affected by factors such as temperature, pressure, and the presence of catalysts or inhibitors. For example, an increase in temperature usually leads to an increase in the rate constant, while the addition of a catalyst can decrease the activation energy and increase the rate constant.

Two specific examples that support this statement are:

1) The effect of temperature on the rate constant: Consider the reaction A → B, which has a rate law equation of rate = k[A]. If the temperature is increased, the rate constant will increase due to the increase in kinetic energy of the reactant molecules. This means that the reaction will proceed faster at higher temperatures, even if the concentration of A remains the same.

2) The effect of catalysts on the rate constant: Consider the reaction C + D → E, which has a rate law equation of rate = k[C][D]. If a catalyst is added to the reaction, it can increase the rate constant by providing an alternate pathway with a lower activation energy. This means that the reaction will proceed faster at the same concentrations of C and D with the catalyst present than without it.

Explanation:

1. Analysis of a 50-g sample of a liquid compound composed of carbon, hydrogen, and nitrogen showed it to contain 9.5 g C, 3.40 g H, and 5.71 g N. What is the percent composition of Hydrogen?​

Answers

The chemical contains 18.26% hydrogen in terms of percentage.

What is mass?

A fundamental physical characteristic of matter is mass, which expresses how much matter is present in an item. It serves as a gauge for an object's resistance to acceleration, therefore the more massive an object, the more force is needed to move it.

How do you determine it?

Calculating the total mass of the compound and the mass of the hydrogen in the compound is necessary to determine the percent composition of hydrogen in the compound.

mass of compound = sum of masses of carbon, hydrogen, and nitrogen.

mass of the mixture= 9.5 g + 3.40 g + 5.71 g

Mass of the compound= 18.61 g.

The compound's mass of hydrogen is:

mass of hydrogen=3.40 g

We can use the following formula to determine the percentage composition of hydrogen:

The percentage of hydrogen=quantity of hydrogen/ the total mass of the chemical x 100%

When we enter the values, we obtain:

hydrogen content as a percentage = (3.40 g/18.61 g) x 100% = 18.26%

Thus, 18.26% of the compound is hydrogen, according to its percent composition.

To know more about mass, visit:

https://brainly.com/question/19694949

#SPJ1

What would you see when titrating if an indicator was not added? no color change would occur; it would not be clear when the equivalence point was reached a color change would still occur; it would not be clear when the equivalence point was reached a color change would still occur, the equivalence point would still be identifiable no color change would occur; the equivalence point would still be identifiable

Answers

A color change would still occur at the equivalence point if an indicator had not been introduced during titration, but it would not be obvious when it had been reached.

Even though the pH of the solution would still vary dramatically at the equivalency point, it would be challenging to determine when this point has been achieved without an indicator. By include an indication in the formula, the endpoint may be identified by a distinct and perceptible color shift. This makes it easier for the researcher to calculate the volume of titrant needed to achieve the equivalence point. So, it would not be possible to determine when the indicator was added if one was not used during titration. a distinct and perceptible color shift.

learn more about indicator  here:

https://brainly.com/question/20264817

#SPJ4

In 1828, Friedrich Wöhler produced urea
when he heated a solution of ammonium
cyanate. This reaction is represented by the
balanced equation below.
H 7+
H-N-H[C=N-O]
I
H
Ammonium
cyanate
H O
\/
N-CIN
H
Urea
Explain why this balanced equation represents a
conservation of atoms.
H
H

Answers

This balanced equation represents the principle of conservation of atoms, which is a fundamental principle of chemistry in the sense that the number and type of atoms are the same on both sides which means that no atoms were created or destroyed during the reaction, only rearranged to form new molecule.

What is a balanced equation?

A balanced equation is described as an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products.

Analyzing the diagram,

On the left-hand side we have :

1 nitrogen atom (N)

3 hydrogen atoms (H)

1 carbon atom (C)

2 oxygen atoms (O)

On the right-hand side:

1 nitrogen atom (N)

4 hydrogen atoms (H)

1 carbon atom (C)

2 oxygen atoms (O)

This can only mean that no atoms were created or destroyed during the reaction, only rearranged to form new molecules.

Learn more about balanced equation atr:

https://brainly.com/question/11904811

#SPJ1

Select all of the following lab techniques that you will utilize in the Recystallization experiment is called

Answers

The correct answer is that the recrystallization is a common technique used to purify solid compounds in organic chemistry.

The following are some of the lab techniques that may be utilized in a recrystallization experiment: Dissolving the impure compound in a suitable solvent. Filtering the solution to remove insoluble impurities. Heating the solution to dissolve the compound completely. Allowing the solution to cool slowly to allow the compound to crystallize out. Filtering the crystallized product using a Buchner funnel or filter paper. Washing the product with a suitable solvent to remove any remaining impurities. Drying the product using a desiccator or oven. Other techniques that may be used in conjunction with recrystallization include melting point determination, thin-layer chromatography, and spectroscopic analysis to confirm the purity and identity of the compound.

To learn more about recrystallization click the link below

brainly.com/question/29215760

#SPJ4

n-octane gas (c8h18) is burned with 95 % excess air in a constant pressure burner. the air and fuel enter this burner steadily at standard conditions and the products of combustion leave at 265 0c. calculate the heat transfer during this combustion 37039 kj/ kg fuel

Answers


The heat transfer during the combustion of n-octane gas (C8H18) with 95% excess air in a constant pressure burner is 37039 kJ/kg fuel. This is calculated using the enthalpy of the formation of the products and reactants. The air and fuel enter the burner steadily at standard conditions, and the products of combustion leave at 265°C.

The enthalpy of combustion of the fuel is determined by subtracting the enthalpy of formation of the reactants from the enthalpy of formation of the products. The enthalpy of formation of the reactants is determined by multiplying the standard enthalpy of formation for each compound in the reaction by the number of moles of each compound and adding the result.


The enthalpy of formation of the products is determined by multiplying the standard enthalpy of formation for each compound in the reaction by the number of moles of each compound and adding the result. The heat transfer during combustion is then determined by subtracting the enthalpy of formation of the reactants from the enthalpy of formation of the products, resulting in 37039 kJ/kg fuel.


The heat transfer during the combustion of n-octane gas (C8H18) can be calculated using the formula Q = m × Cp × ΔT. Here, m is the mass of the fuel burnt, Cp is the specific heat capacity, and ΔT is the change in temperature. Let's substitute the given values: Mass of fuel burnt = 1 kg (since 37039 kJ/kg fuel is given)Cp of n-octane gas = 2.22 kJ/kg/K (given)ΔT = (265 - 25) = 240 K (since the temperature of products is given as 265°C = 538 K and standard temperature is 25°C = 298 K)Therefore, the heat transfer during combustion of n-octane gas is: Q = m × Cp × ΔT = 1 × 2.22 × 240 = 532.8 kJAnswer: The heat transfer during this combustion is 532.8 kJ.

For more information follow the link: https://brainly.com/question/14754029

#SPJ11

you are given the following information at 1000 K.CaCO3(s) CaO(s) + CO2(g) K1 = 0.039C(s) + CO2(g) 2 CO(g) K2 = 1.9Determine the equilibrium constant at 1000 K for the following.CaCO3(s) + C(s) CaO(s) + 2 CO(g)

Answers

The equilibrium constant at 1000K for the reaction CaCO3(s) + C(s) --> CaO(s) + 2CO(g) is K = K1.K2 = 0,039 . 1,9 = 0,074.

The equilibrium constant at 1000 K for the given chemical reaction, CaCO3(s) + C(s) CaO(s) + 2 CO(g), can be determined as follows:

[tex]K1 = 0,039\\K2 = 1,9[/tex]

We know that the equilibrium constant of a reaction is the product of the equilibrium constants of its individual steps (if the reaction is made up of more than one step) under the given conditions. Therefore, we can use the following equations to calculate the equilibrium constant of the given reaction: [tex]Kc = \frac{K1. K2}{Keq}[/tex] (where Keq is the equilibrium constant of the desired reaction) [tex]Kc = [(P(CO))^2/(P(CaCO3).P(C))] . 0,039 . 1,9[/tex].

Now, we have to express the pressure of all the species involved in terms of the equilibrium constant of the reaction we need to find. For this, we use the following relation:

Keq = [tex](P(CaO).P(CO)^2)/(P(CaCO3).P(C))[/tex]. On substituting the above expression for Keq in the expression for Kc, we get:

Kc = [tex][(P(CO))^2/(P(CaCO3).P(C))] . 0,039 . 1,9[/tex]

Keq = [tex](P(CaO).P(CO)^2)/(P(CaCO3).P(C))[/tex]

On comparing the expressions for Kc and Keq, we get:

[tex]Kc = K1 . K2/Keq\\Kc = [(P(CO))^2/(P(CaCO3).P(C))] . 0.039 . 1.9\\Kc = (P(CaO).P(CO)^2)/(P(CaCO3).P(C))[/tex]

Therefore, we can write: [tex](P(CaO).P(CO)^2)/(P(CaCO3).P(C))[/tex]

Kc =[tex][(P(CO))^2/(P(CaCO3).P(C))] . 0,039 . 1,9(P(CaO).P(CO)^2)/(P(CaCO3))^2[/tex]

[tex]Kc = 0,039. 1,9P(CO)^2/P(CaCO3) \\Kc = 0,074251/P(CaO) \\Kc = (P(CaCO3).P(C) )/P(CO)^2.[/tex]

Now, using the expression for Keq, we can write:

[tex]Keq = (P(CaO).P(CO)^2)/(P(CaCO3).P(C))\\Keq = (P(CaCO3).P(C).P(CO)^2)/(P(CaCO3).P(C))\\Keq = P(CO)^2/P(C)\\Keq = 0.07425[/tex]

Learn more about equilibrium constant: brainly.com/question/3159758

#SPJ11

consider an ideal gas of molecules, with n adsorbing sites. each site can be occupied or unoccupied by one or two of the ideal gas molecules. determine the average number of molcules adsorbed by the table

Answers

The average number of molecules adsorbed by the table is the number of different ways of placing a total of r particles on n adsorption sites when two particles can occupy each site given by (r + n-1) C (n-1).

This formula follows from the fact that each placement corresponds to choosing n-1 boundaries that divide the particles into n groups (each group may be empty) and then putting one group into each adsorption site. Thus the required number of ways is(r + n-1) C (n-1). The number of ways of placing r particles on n adsorption sites when one or two particles can occupy each site is the sum of the number of ways in which exactly one particle occupies a site and the number of ways in which two particles occupy a site. Each adsorption site can be either empty, occupied by one molecule, or occupied by two molecules. Therefore, there are three different states that each adsorption site can have. There are n adsorption sites, and therefore there are 3n different states that the table can have. Each state is characterized by the number of molecules adsorbed by the table. Therefore, the average number of molecules adsorbed by the table is given by the sum of the number of molecules adsorbed in each state, divided by the total number of states. The number of molecules adsorbed in each state is the sum of the number of molecules adsorbed by each adsorption site, overall adsorption sites. Therefore, the number of molecules adsorbed in each state is either 0, 1, or 2.

Learn more about  ideal gas   at brainly.com/question/28257995

#SPJ4

0.5 l of 1.0 m hcl solution was titrated by 0.5 l of 1.0 m naoh. what is the ph after this titration?

Answers

The pH of the HCl solution which is titrated by 0.5L of 1.0m NaOH is 7.

What is pH?

The pH after the titration of 0.5 L of 1.0 M HCl solution with 0.5 L of 1.0 M NaOH can be calculated as follows:

To start, we must write down the balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide: HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

The moles of HCl and NaOH involved in the reaction can be calculated as follows: 0.5 L of 1.0 M HCl = 0.5 mol HCl

0.5 L of 1.0 M NaOH = 0.5 mol NaOH

Since NaOH is in excess, it reacts completely with HCl, which means that 0.5 mol NaOH will react with 0.5 mol HCl. The balanced chemical equation shows that one mole of HCl reacts with one mole of NaOH to produce one mole of water, so all of the HCl has been neutralized, leaving only NaCl and water behind.

The concentration of the NaCl solution that results can be calculated as follows:

Concentration of NaCl = 0.5 mol NaCl / 1.0 L = 0.5 M NaCl

The pH of the resulting solution of NaCl can be calculated using the following equation:

pH = - log [H⁺]

where [H⁺] is the concentration of hydrogen ions in the solution. Since NaCl is a salt and completely dissociates in water, it does not contribute any hydrogen ions to the solution, which means that the concentration of hydrogen ions is zero. As a result, the pH of the solution is equal to 7, which is neutral.

Learn more about pH here:

https://brainly.com/question/491373

#SPJ11

A change that is useful for the environment and living things is called

Answers

The change that is useful for the environment and living things is called "positive environmental change."

Positive environmental change refers to any alteration or modification in the environment that improves or benefits living organisms' well-being. Examples of positive environmental changes include reducing pollution, conserving water, using renewable energy sources, and recycling waste products. Positive environmental change is essential to ensure a sustainable future and to maintain the planet's biodiversity.

It can be achieved by implementing new policies, practices, and technologies that promote sustainable development and reduce the negative impact on the environment. Positive environmental change can also help to address climate change and other environmental challenges faced by humanity. By taking positive steps to protect the environment, we can ensure that future generations can also enjoy a healthy, prosperous, and sustainable planet.

To learn more about positive environmental change, here

https://brainly.com/question/30033700
#SPJ4

For the precipitation reaction occurring between iron (II) chloride, FeCl2 and potassium carbonate K2CO3, show the Molecular, Complete Ionic and Net Ionic Equations
If you take 20 g FeCl2 and 25 g K2CO3, what will be the theoretical yield of the solid product? This calculation depends on the limiting agent.

Answers

The theoretical yield of the solid product FeCO₃ in the reaction here is 18.18 grams. This is because, FeCl₂ is a limiting agent.

What is the theoretical yield?

The precipitation reaction occurring between iron (II) chloride, FeCl₂ and potassium carbonate K₂CO₃

The Molecular equation is given below: FeCl₂ + K₂CO₃ → FeCO₃ + 2KCl

The Complete Ionic equation is given below: Fe₂⁺ + 2Cl⁻ + 2K⁺ + CO₃²⁻ → FeCO₃ + 2K⁺ + 2Cl⁻

The Net Ionic equation is given below: Fe²⁺ + CO₃²⁻→ FeCO₃

Molar mass of FeCl₂ = 126.75 g/mol

Molar mass of K₂CO₃ = 138.21 g/mol

n(FeCl₂) = mass/Mr = 20/126.75 = 0.1578 m

n(K₂CO₃) = mass/Mr = 25/138.21 = 0.1808 m

Therefore, FeCl₂ is the limiting agent. The theoretical yield of FeCO₃ can be calculated as follows: FeCl₂ + K₂CO₃ → FeCO₃ + 2KCl

1 mole of FeCl₂ produces 1 mole of FeCO₃

Moles of FeCO₃ produced = 0.1578 mol

FeCO₃ molar mass = 115.86 g/mol

Mass of FeCO₃ produced = 0.1578 mol × 115.86 g/mol = 18.18 g

Thus, the theoretical yield of the solid product FeCO₃ is 18.18 g.

Learn more about Theoretical yield here:

https://brainly.com/question/14966377

#SPJ11

Which of the following bonds would be the most polar without being considered ionic?
a. F-H
b. Na-F
c. S-H
d. Cl-H
e. O-H

Answers

The bond which would be the most polar without being considered ionic is O-H. Thus, option e is correct.

What is a polar bond?

A polar bond is defined as a bond between two atoms where there is an uneven distribution of electrons between the atoms.

What is an ionic bond?

Ionic bonds are bonds that occur between two atoms when one atom donates its electron to another atom, resulting in the two atoms being electrically attracted to each other.

Polar covalent bonds occur when electrons are unequally shared between two atoms.

This occurs when two atoms have different electronegativity values, meaning that one atom pulls more strongly on the shared electrons than the other atom.

Thus, the O-H bond would be the most polar without being considered ionic.

Learn more about polar bonds here:

https://brainly.com/question/545359

#SPJ11

A certain half-reaction has a standard reduction potential EPod=-0.75 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at least 0.90 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the cathode of the cell. Is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? Is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have? By using the information in the ALEKS Data tab, write a balanced equation describing a half reaction that could be used at the anode of this cell. Note: write the half reaction as it would actually occur at the anode.

Answers

Using the following formula, the total cell potential, Ecell, may be calculated:   Ecathode + anode equals Ecell. where Ecathode is the cathode half-reduction reaction's potential and Eanode.

We can determine the minimal Eanode needed to create a cell potential of 0.90 V since the engineer suggests employing a half-reaction with EPod = -0.75 V at the cathode:

Ecathode + anode equals Ecell.

Eanode: 0.90 V = -0.75 V

Eanode = 0.75 0.90 volts

Eanode equals 1.65 V.

The half-reaction employed at the anode must thus have a standard reduction potential of -1.65 V or less.

The typical reduction potential of the half-reaction utilised at the anode, on the other hand, has no upper limit. Yet, a higher Ecell and a more effective galvanic cell would be produced by a larger reduction potential at the anode.

We can utilise the half-reaction to create a balanced equation for the anode half-reaction:

Cu(s) becomes Cu2+(aq) plus 2e-

learn more about  half-oxidation reaction's potential.here:

https://brainly.com/question/23302600

#SPJ4

the procedure for making zeolite is carried out in an acidic medium. true or false

Answers

The statement "the procedure for making zeolite is carried out in an acidic medium" is False.

Zeolite is a crystalline aluminosilicate mineral that occurs naturally.

It is widely used in various applications, including water purification, agriculture, and petrochemical refining.

Zeolites can be synthesized in the laboratory using different methods, such as hydrothermal and sol-gel methods.

The zeolite synthesis process is carried out in an alkaline or basic medium, not in an acidic medium.

Alkaline solutions, such as sodium hydroxide or potassium hydroxide, are commonly used to initiate the synthesis reaction, which involves the reaction of a source of silica, such as silicate, with a source of alumina, such as aluminate, in the presence of water and other chemical agents.

There are various types of zeolites with different chemical compositions, crystal structures, and properties.

The specific synthesis conditions, such as temperature, pressure, and reaction time, can also affect the final properties of the zeolite.

Therefore, the synthesis of zeolites requires precise control of the reaction conditions to obtain the desired properties.

Zeolites have a unique structure that can adsorb and exchange ions and molecules.

This property makes them useful in various applications, such as catalysis, separation, and ion exchange.

Zeolites can also be modified or functionalized to enhance their properties for specific applications.

For similar question on zeolite.

https://brainly.com/question/14976531

#SPJ11

Consult your laboratory notebook and notes about the color changes you observed during the titration to select the choice that most correctly describes the pH range and color change observed with the phenolphthalein indicator. a. When the indicator was added to the solution, it started out colorless, turned to pink at about pH 9 and was deep purple at the first equivalence point. b. When the indicator was added to the solution, it started out a deep purple, turned to pink at about pH 9 which faded to become colorless at the first equivalence point. c. When the indicator was added to the solution, started out blue, became green during the titration at about pH 5 and turned to yellow at the second equivalence point and beyond. d. When the indicator was added to the solution, it started out yellow, passed through green at about pH 5 and became blue at the second equivalence point and beyond.

Answers

Consulting the laboratory notebook and notes about the color changes observed during titration, it is seen that the most accurate option for phenolphthalein is option (a).

When phenolphthalein was added to the solution, it started out colorless, turned to pink at about pH 9, and was deep purple at the first equivalence point.

Phenolphthalein is a pH-sensitive indicator that changes color in the pH range of 8.3 to 10.0. The colorless form of phenolphthalein is present in acidic solutions, whereas the pink form of phenolphthalein is present in basic solutions. The deep purple coloration is representative of the first equivalence point.

The pH of a solution can be determined using an acid-base indicator. Indicators are chemicals that change color in response to changes in acidity. Indicators are typically used to determine the endpoint of an acid-base titration when the pH changes rapidly over a small range of volumes. The color of the indicator corresponds to a specific pH value.

A colorless solution with a low pH will gradually become pink as it approaches the endpoint. As a result, the pH range observed with the phenolphthalein indicator is from about pH 8.3 to 10.0, with a color change from colorless to pink occurring around pH 9.0.

Therefore, "When the indicator was added to the solution, it started out colorless, turned to pink at about pH 9, and was deep purple at the first equivalence point" is the correct answer.

To know more about phenolphthalein, refer here:

https://brainly.com/question/15211751#

#SPJ11

Identify the compounds that should rearrange following the same mechanism as the pinacol rearrangement?

Answers

The pinacol rearrangement is a well-known organic reaction that involves the rearrangement of vicinal diols, which are compounds that have two hydroxyl groups (-OH) attached to adjacent carbon atoms.

The reaction typically occurs under acidic conditions and results in the formation of ketones or aldehydes.

The mechanism of the pinacol rearrangement begins with protonation of one of the hydroxyl groups, usually the more acidic one, by an acid catalyst.

This protonation leads to the formation of a carbocation intermediate, which is a carbon atom with a positive charge due to the loss of a proton.

The adjacent hydroxyl group then attacks the carbocation, forming a carbon-oxygen bond and leading to the formation of a cyclic intermediate.

This cyclic intermediate is unstable and rearranges through migration of the alkyl group or hydrogen atom from the carbocation to the adjacent carbon atom, forming a new carbocation intermediate.

This rearrangement is typically facilitated by the presence of neighboring electron-withdrawing or electron-donating groups that stabilize the intermediate carbocation through resonance or inductive effects.

The rearranged carbocation intermediate is then deprotonated, leading to the formation of a ketone or an aldehyde, depending on the conditions and the specific structure of the starting compound.

The final product of the pinacol rearrangement is typically a ketone or an aldehyde with a carbonyl group (C=O) in the position where the original hydroxyl group was attached.

To learn more about carbonyl group, refer below:

https://brainly.com/question/13564853

#SPJ11

HELP ASAP with a culminating project !!!

Introduction:
Many adults do not understand why some materials attract while other materials do not. We will be learning about the different kinds of elements that exist in the world that help us to create materials that we currently have to produce the clothes we wear, the phones we use, the games we play, and more. To help educate adults we will be making a board game to help people understand the properties of different elements and how we can use those properties to predict their interactions.

Challenge: You have been hired by a local Toy Store to design and create a fun and interactive game to educate young adults and children about the physical properties of elements and compounds. You will design a proposal for an interactive game to help players understand the properties of elements and apply their knowledge to show how elements interact to form compounds.
You will make a strategic guide for successfully playing their group's game and explain why the strategies are successful


Project Criteria for Success:
Decide what type of game you want to create. Consider creating your game using the same rules as a well known game (such as Monopoly, Wheel of Fortune, Jeopardy, Candyland, Shoots and Ladders, Apples to Apples, Cards against Humanity, etc).


•Create a blueprint of your game, Explain how it will be designed. Make sure your game is school appropriate
• Your game must include:
At least 8 different elements/atoms on the periodic table
Each element represents a game piece or part of a card or category (ie Wheel of Fortune/Jeopardy)
Information about the properties of the elements/atoms;
Be sure to consider the family of each element you have selected
• Show that elements combine with other elements/atoms (bond) to make compounds (form chemical reactions)


Individual Project Criteria for Success
Your strategic guide should
| Explain Your Game
What is the name of your game?
What is the maximum number of players?
How is your game played and what are the rules?
•How does someone win?


Explain patterns of elements in the Periodic Table and describe how this knowledge will help someone successful win your game
Select an element from your game and make a model (drawing with labels) to identify the different subatomic particles and their location in and around the atom.
Explain the patterns of protons across the periodic table and within families.
Explain the patterns of the number of valence elections (outer shell of atom) across the periodic table and within families.


Using your knowledge of the periodic table and elements from your game, construct an explanation to describe the patterns (trends) across a period (row) and within a family (group). Your explanation should include patterns for
radius (size)
electronegativity
reactions with water (alkali metals)


• Select elements from your game and explain how to use valence electrons to predict the formation of an ionic
compound.
• Explain how you can predict which elements can bond to form a covalent compound.
Calculate the difference in electronegativity of the two elements selected.






Answers

Game Proposal: Element Explorers

Name of Game: Element Explorers

Maximum Number of Players: 4-6 players

How to Play: Each player selects a game piece that represents one of the eight elements from the periodic table in the game. Players move around the board, answering questions related to the properties of elements and their reactions. The questions can be multiple-choice, true/false or short-answer format. Players earn points for correct answers and can use them to buy property or "compounds" on the board. The goal of the game is to collect as many compounds as possible and have the most points at the end. The winner is the player with the most points.

Element Properties: Each element in the game will be associated with its chemical symbol, family, atomic number, atomic mass, and properties such as melting point, boiling point, density, and reactivity. The families of elements represented in the game will include alkali metals, alkaline earth metals, halogens, and noble gases.

Patterns in the Periodic Table: Understanding the patterns in the periodic table is key to being successful in Element Explorers. For example, the number of valence electrons in an atom can be predicted based on the family it belongs to, which affects how it will react with other elements. The electronegativity of an element can also be predicted based on its location on the periodic table, which indicates how easily it can attract electrons and form bonds.

Subatomic Particles: Let's take one of the elements from the game, hydrogen (H), as an example. Hydrogen has one proton and one electron in its neutral state, and its atomic mass is approximately 1.0079 atomic mass units (amu). A simple drawing of a hydrogen atom would include a nucleus containing one proton and possibly one or two neutrons, with one electron in the outer shell.

Patterns in Protons and Valence Electrons: Across a period in the periodic table, the number of protons in the nucleus increases, which affects the size of the atom and its reactivity. Within a family, the number of valence electrons is the same, which affects the element's reactivity and the types of compounds it can form.

Ionic and Covalent Compounds: Valence electrons are crucial in determining whether an ionic or covalent bond will form between two elements. In an ionic bond, one element donates electrons to another element that accepts them, forming a positively charged cation and negatively charged anion. In a covalent bond, two atoms share electrons, forming a molecule. The difference in electronegativity between two elements can be used to predict whether they will form an ionic or covalent bond.

Calculating Electronegativity Difference: Let's take an example of two elements from the game, sodium (Na) and chlorine (Cl), which form an ionic compound (NaCl). Sodium has an electronegativity of 0.93, while chlorine has an electronegativity of 3.16. The difference in electronegativity is 2.23 (3.16-0.93), indicating a highly polar bond between the two elements.

If you can, give me brainliest please!

what product is finally formed when the initial compound formed from cyclohexanone and morpholine is mixed with methyl iodide and that product is heated and then hydrolyzed

Answers

When the initial compound formed from cyclohexanone and morpholine is mixed with methyl iodide and heated and then hydrolyzed, the product that is finally formed is N-Methylaminoethylcyclohexanone.

The reaction between cyclohexanone and morpholine in the presence of an acid catalyst produces a cyclic imine named N-morpholino-cyclohexanone, which is an intermediate in the synthesis of several drugs. It reacts with methyl iodide and potassium carbonate in methanol to form N-methylaminoethylcyclohexanone, which upon hydrolysis produces the final product, N-methylaminoethylcyclohexanone. This reaction is an example of the Mannich reaction.N-methylaminoethylcyclohexanone is a synthetic intermediate and a building block for the synthesis of various drugs. It's commonly used as an intermediate in the synthesis of sedatives and analgesics. It's also used in the synthesis of ephedrine analogs and the anticancer agent 2-[2-(4-ethoxyphenyl)ethyl]aminoethylcyclohexanone.

Learn more about hydrolysis here: https://brainly.com/question/30578484

#SPJ11

(a) What would you expect the pH of pure water to be?(b) What colour would the universal indicator show in an aqueous solution of sugar? Why?(c) A sample of rain water turned universal indicator paper yellow. What would you expect its pH to be? Is it a strong or a weak acid?

Answers

(a) The pH of pure water is 7, which is neutral. (b) The universal indicator would show a yellow color in an aqueous solution of sugar, because sugar is a neutral compound with a pH of 7.(c) The pH of the rain water is likely around 5 or 6, which indicates a weak acid.

pH is less than 7 since yellow color indicates acidic rainwater. Rainwater has an acidic pH because it dissolves atmospheric carbon dioxide (CO2), sulfur dioxide (SO2), and nitrogen oxides (NOx), forming weak carbonic, sulfuric, and nitric acids.

Rainwater that has a pH below 5.6 is considered to be acid rain. Therefore, the acid present in rainwater is a weak acid because the pH of the rainwater is above 1.

Learn more about pH here:

brainly.com/question/15289741

#SMJ11

a 25.00 ml monoprotic strong acid solution was titrated with 0.09014 m naoh. 8.781 ml of naoh was required to reach the endpoint of the titration. calculate the number of moles of naoh used in this titration.

Answers

The number of moles of NaOH used in this titration of a 25.00 ml monoprotic strong acid solution is 0.0007919 moles.

In order to find out the number of moles of NaOH used in a titration, we can use the formula:

moles of NaOH = concentration of NaOH × volume of NaOH used in titration

Given:Volume of monoprotic strong acid solution = 25.00 mL

Concentration of NaOH = 0.09014 M

Volume of NaOH used in titration = 8.781 mL

We can convert mL to L by dividing it by 1000. So,Volume of monoprotic strong acid solution = 25.00 mL = 25.00/1000 L = 0.02500 L

moles of NaOH = concentration of NaOH × volume of NaOH used in titration= 0.09014 M × 8.781/1000 L= 0.0007919 moles of NaOH

Hence, the number of moles of NaOH used in this titration is 0.0007919 moles.

More on titration: https://brainly.com/question/15568269

#SPJ11

Other Questions
Find the standard normal area for each of the following(round your answers to 4 decimal places) Julio bought a fish tank shaped like a rectangular prism. The inside of the tank measures 2424 inches in length, 1010 inches in width, and 1212 inches in height. The tank is filled with water to a height of8 8 inches. How many more cubic inches of water are needed to fill the tank to the top? 1 0 60 1 10 0 0Find the solution(s) to the system, if it exists. State the solution as a point (be sure to use parentheses), use parameter(s) s and t if needed. If the system is inconsistent, then state no solution. Suppose the real risk-free rate is 3.50%, the average future inflation rate is 2.25%, a maturity premium of 0.08% per year to maturity applies, i.e., MRP = 0.08%(t), where t is the years to maturity. Suppose also that a liquidity premium of 0.5% and a default risk premium of 0.85% applies to A-rated corporate bonds. How much higher would the rate of return be on a 10-year A-rated corporate bond than on a 5-year Treasury bond? What are some types of MDM software that can be used to push applications to Macs? Find the volume and surface area of soda if the radius is 6cm and the height is 11cm An equation is given. x + 9 = 6xWhat is one solution to the equation?x= A circuit consists of a 10.0-ohm resistor, a 15.0-ohm resistor, and a 20.0-ohm resistor connected in parallel across a 9.00-volt battery. What is the equivalent resistance of this circuit?0.200 1.95 4.62 45.0 How did repealing apartheid laws change international sanctions against South Africa? Countries lifted sanctions against South Africa. Countries increased sanctions against South Africa. A few countries kept sanctions in place. Several other countries created sanctions against South Africa. George is an octogenarian. Every time he visits his granddaughter, he finds that she uses strange and new words like YOLO and tweeting. Likewise, his granddaughter misinterprets some of his vocabulary, and both of them end up explaining their vocabulary to each other. Which of the following characteristics of language is indicated in this scenario?Language is constantly changing.Language is concrete.Language is arbitrary.Language is abstract. Which of the following is not an example of an attention getter? a. Stating a fact b. Asking a question c. Making a statement of relevance d. Telling a story e. When approaching a stop sign that is not marked by a crosswalk, drivers should stop their vehicles before entering the intersection. Explanation At a stop sign, you must come to a complete stop at the stop line, if there is one. If there is no stop line, you must make a complete stop before entering the crosswalk. The volume of two similar figures are given. The surface area of the larger figure is given. Find the surface area of the smaller figure.V=4000m^3V=6912m^3S.A.=2304m^3 The graph showing the % consumption of various materials from the developed nations was super interesting. It showed that these countries often consumed about 50% of the global resources yet represent only about _______% of the global population. Which of the following statements is true? If a company:a. reports net income on its income statement, it should report an increase in cash on its statement of cash flows.b. reports a net loss on its income statement, it should report a decrease in cash on its statement of cash flows.c. uses the accrual basis of accounting, it will improve its cash position if it reports net income for the same period.d. uses the accrual basis of accounting its cash balance can increase even if it reports a net loss. 3 reasons why discrimanaton against gender is illegal in the South African Constitution All of the following complicate the implementation of an international diversification strategy EXCEPTa. widespread multilingualism.b. increased costs of coordination between business units.c. cultural diversity.d. logistical costs. Write a story to illustrate the statement that Never rush in life Your network consists of three domain sin a single fores: eastsim.com, acct.eastsim.com, and dev.eastsim.com.You have formed a partnership with another company. They also have three domains: westsim.com, mktg.westsim.com, and sales.westsim.com.Because of the partnership, users in all domains for the eastsim.com forest need access to resources in all three domains in the partner network. Users in the partner network should not have access to any of your domains.You need to create the trust from the eastsim.com network. What should you do? (Select three.)Create external trusts from eastsim.com to each of the domains in westsim.com.Do not use selective authentication.Create the trust as an outgoing trust.Create the trust as an incoming trust.Create a forest trust between eastsim.com and westsim.com.Use selective authentication. you expect to receive $43,000 at graduation in two years. you plan on investing it at 9.75 percent until you have $178,000. how long will you wait from now? (do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)