When 35.00 grams of niobium is mixed with 75.00 grams of iodine the percent yield for the product is 63.29% the mass of the product (in grams) formed is 60.50g
The chemical equation of the reaction between Niobium and Iodine is given by,
3Nb(s) + 4I₂(s) ------> Nb₃I₈(s)
Stoichiometrically, 4moles I₂ is reacting with 3moles of Nb
Given moles of Nb = 35.00g /92.91g/mol = 0.3767mol
Given moles of I₂ = 75.00g/253.8g/mol = 0.2955mol
0.3767moles of Nb reacts with (4/3) × 0.3767mol = 0.5023mol of I2 but available moles of I₂ is 0.2955mol
Therefore,
Limiting reactant is I₂
stoichiometrically, 4 moles of I₂ gives 1mole of Nb₃I₈
0.2955moles of I₂ gives 0.2955mol/4 = 0.073875 moles of Nb₃I₈
molar mass of Nb₃I₈ = 1293.93g/mol
Theoretical yield = 1293.93g/mol × 0.073875mol = 95.59g
Percent yield = (Actual yield / Theoretical yield) ×100
63.29 = (Actual yield /95.59g ) × 100
Actual yield = 60.50g
Therefore,
The mass of the product formed is 60.50g
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When 35.00 grams of niobium is mixed with 75.00 grams of iodine the percent yield for the product is 63.29% the mass of the product (in grams) formed is 60.50g
The chemical equation of the reaction between Niobium and Iodine is given by,
3Nb(s) + 4I₂(s) ------> Nb₃I₈(s)
Stoichiometrically, 4moles I₂ is reacting with 3moles of Nb
Given moles of Nb = 35.00g /92.91g/mol = 0.3767mol
Given moles of I₂ = 75.00g/253.8g/mol = 0.2955mol
0.3767moles of Nb reacts with (4/3) × 0.3767mol = 0.5023mol of I2 but available moles of I₂ is 0.2955mol
Therefore,
Limiting reactant is I₂
stoichiometrically, 4 moles of I₂ gives 1mole of Nb₃I₈
0.2955moles of I₂ gives 0.2955mol/4 = 0.073875 moles of Nb₃I₈
molar mass of Nb₃I₈ = 1293.93g/mol
Theoretical yield = 1293.93g/mol × 0.073875mol = 95.59g
Percent yield = (Actual yield / Theoretical yield) ×100
63.29 = (Actual yield /95.59g ) × 100
Actual yield = 60.50g
Therefore,
The mass of the product formed is 60.50g
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consider the following oxides: so2so2 , y2o3y2o3 , mgomgo , cl2ocl2o , and n2o5n2o5 . how many are expected to form acidic solutions in water?
Nonmetal oxides form acid solutions. SO2, Cl2O, and N2O5 are acid solutions.
A chemical that offers off hydrogen ions in water and paperwork salts through combining with positive metals. Acids have a sour flavor and turn positive dyes purple. a few acids made by using the body, such as gastric acid, can assist organs work the way they must. An example of an acid is hydrochloric acid.
An acidic solution has a high attention of hydrogen ions, H +start superscript, plus, stop superscript, greater than that of pure water. An acidic solution is a liquid combination that happens when hydrogen ions are launched while mixed with water. This definition is known as the Brønsted-Lowry theory: acids provide hydrogen protons, at the same time as bases "accept" hydrogen protons. some answers are more acidic than others.
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Which of these pairs of elements would be most likely to form a molecular compound?
a.
P and Br
b.
Cu and K
C.
K and O
d.
O and Zn
e.
Al and Rb
The alkali metals, found in group 1 of the periodic table, are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they readily lose that one electron to form ionic bonds with other elements. Sodium (na) is an alkali metal that bonds with chlorine (cl), a halogen, to form table salt (nacl). Based on what the periodic table can tell you about these two elements, explain how and why they bond to form nacl.
Answer:
The periodic table is a useful tool for understanding the properties of elements and predicting how they will interact with each other. The alkali metals, including sodium, are located in group 1 of the periodic table. These elements have only one electron in their outermost shell, which makes them very reactive. They readily lose this outer electron to form an ion with a positive charge, which is called a cation.
Chlorine, on the other hand, is a halogen located in group 17 of the periodic table. Halogens have seven electrons in their outermost shell, which makes them highly reactive. They readily gain an electron to form an ion with a negative charge, which is called an anion.
When sodium and chlorine interact, they form an ionic bond to create the compound sodium chloride, or table salt. In this process, sodium loses its outer electron to form a sodium cation, and chlorine gains an electron to form a chlorine anion. The positive sodium cation is then attracted to the negative chlorine anion, forming an ionic bond. This bond is strong enough to hold the two ions together, creating a stable compound.
Therefore, sodium and chlorine bond to form table salt because they have the opposite charges and opposite reactivities that are necessary to form an ionic bond. The periodic table can help us understand this bonding process by providing information about the number of electrons in the outermost shell of each element, which determines their reactivity and ability to form ions.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, in below given ways, periodic table helps in explaining the reason of bonding.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
Because sodium and chlorine have the opposing charges and reactivities required to create an ionic bond, they bind to make table salt. The periodic table can help us comprehend this bonding process by revealing the amount of electrons in each element's outermost shell, which governs their reactivity and capacity to generate ions.
Therefore, in above ways, periodic table helps in explaining the reason of bonding.
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the epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart c. is always visible in all cardiac views d. all of the above e. a and b onl
The epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart.
It is the posterior fat pad that is a sign that indicates a pathology when one looks at an x-ray. When a crescent fat is observed in the x-ray, it indicates there is an elbow joint effusion since normally the posterior fat cannot be seen from the x-ray.
In radiography, X-rays are used to view inner parts of the body for medical observation, analysis and to know the treatment procedure to adopt.
When a non visible posterior fat pad on a well-exposed, then it generally suggests a negative study for injury. This means that the features observed are unrelated to any type of injury. This eliminates option c.
Therefore, only option a and b are correct that the epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart.
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what are the correct coefficients if the law of conservation of mass is applied to the decomposition of solid ammonium nitrite to nitrogen gas and liquid water?
Ammonium nitrite, NH4NO2, will decompose to yield nitrogen gas and water Vapor by the following equation:
NH4NO2(s)--->2H2O(g)+N2(g)
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products. As per law of conservation of mass, the mass of your initial substances (reactants) will be the same as the mass of the substances that you get after the reaction has occurred (products). The mass will stay the same because the number of each kind of atom stays the same. The mass will increase because a new kind of molecule is formed. The principle is that the mass of matter, in a closed system, will always be the same no matter what type of change happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination of these, the amount of mass will not change.
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how to balance: CaCl2(aq) + Na3PO4(aq) ⟶ Ca3(PO4)2(s) + NaCl(aq)
can someone explain how to do it? thanks
The given double displacement reaction can be balanced as written below:
[tex]\rm 3CaCl_{2} + 2Na_{3}PO_{4} \rightarrow Ca_{3}PO_{4} + 6 NaCl \\[/tex]
What is displacement reaction?Displacement reactions are those in which one or two groups are replaced to form the new products. There are both single displacement reaction and double double displacement reactions.
In single displacement reactions, only one reactant will be replaced in the reaction whereas in double displacement reactions, two groups from the reactants are exchanged each other.
In the given reaction, the phosphate group is replaced to Ca and the Cl is group is shifted to Na metal as written in the chemical equation.
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a brittle white crystalline solid has a melting point of 760 c and reacts when added to water. this substance is most likely what type of solid
A brittle white crystalline solid reacts with when added to water is Quartz. It is a metamorphic solid.
Quartz is the most abundant silica mineral. Pure Quartz is colorless and transparent. It occurs in most igneous and practically all metamorphic and sedimentary rocks. It is used as a component of numerous industrial materials. Silicon (Si) has the atomic number 14 and is closely related to carbon. It is a relatively inert metalloid. Silicon is often used for microchips, glass, cement, and pottery. Silica is the most abundant mineral found in the crust of the earth. One of the most common uses of silica quarts is the manufacturer of glass. Quartz is the second most abundant mineral in the Earth's crust. Its chemical name is SiO2.
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Question: An atom from group 2A forms an ionic bond with an atom from another group. Which group is the second atom MOST LIKELY from?
The group of chemical element which an atom from group 2A forms an ionic bond with is most likely from group 7A
What element an atom from group 2A forms Ionic bond with from group 7AAn ionic bond can formed between calcium from from group 2A and fluorine from group 7A to form calcium fluoride. In order words, Calcium fluoride is an ionic chemical compound which is insoluble in water. Calcium fluoride is composed of calcium ion and fluoride ion.
In conclusion, it can be deduced from the explanation given above that calcium fluoride is an ionic compound.
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If an atom, such as hydrogen, is able to form a covalent bond, describe what happens when the
electron shells of two atoms overlap?
The potential energy between the nuclei is minimized and the orbital shells overlap.
What is a covalent bond?We know that a covalent bond is the kind of bond that is formed when there is the combination of two atoms when there is the overlap of the orbitals of the two atoms. In the case of the hydrogen atoms, we can say that there is a bond as we notice that the two atomic orbitals have become overlapped on each other.
Let us note that when the two atoms are still far from each other, the potential energy between the atoms is high and as such the atoms of the element would tend to repel each other.
As the two atoms begin to approach each other, the repulsion between the nuclei of the elements is seen to become minimized and the bond is now seen to be formed as the atomic orbitals become overlapped.
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20.00 g sample of methyl salicylate contains 12.63 g of carbon, 1.06 g of hydrogen, and 6.31 g of oxygen, the empirical formula of methyl salicylate is
20.00 g sample of methyl salicylate contains 12.63 g of carbon, 1.06 g of hydrogen, and 6.31 g of oxygen, the empirical formula of methyl salicylate is C8H803.
The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.
The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.
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select true or false: more energy is required to break a bond with an order of 3/2 than is required to break a bond of order 2.
Answer: The answer is false
Explanation:
what is the formal charge on phosphorus in a lewis structure for the phosphate ion that satisfies the octet rule?
The formal charge on phosphorus in a lewis structure for the phosphate ion that satisfies the octet rule is 0.
What is a Lewis structure?
All valence electrons are represented by Lewis structures, which are structural formulas for molecules and polyatomic ions. These structural formulas are commonly referred to as Lewis dot structures since valence electrons are frequently shown as dots.
Why is Lewis structure used?
Chemical bonds and atomic structures are examined and understood using Lewis structures. The type of bonds created between atoms using valence electrons or/and lone pairs, as well as the number of bonds an atom can or will form with other atoms, can all be determined using Lewis dot diagrams.
Lewis structure of phosphate (po43-) ion.Formal charge= no. of valence electrons - no. of non bonding valence electrons- [tex]\frac{total no. of bonded electrons }{2}[/tex]
Formal charge of P= 5-0-[tex]\frac{10}{2}[/tex] = 0
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if a sample of magnesium has a mass of 72.9 g, how many moles of magnesium does the sample contain?
Answer:
3 moles
Explanation:
Mg has molar mass of 24.31 g/mol
so 72.9 g / 24.31 g/mo = 3 moles
Choose the exothermic reaction that is used to ignite the Mg + Oxygen reaction (step 2) that eventually lights the thermite.
2 H2 + O2 ----> 2 H2O
2 Na + O2 ----> Na2O
CH4 + 2 O2 ----> 2 H2O + CO2
2 C4H10 + 13 O2 ----> 8 CO2 + 5 H2O
The reaction that can light the thermite is the combination of methane and oxygen. Option C
What is an ignition reaction?There is an ignition reaction when we burn a substance in another substance. Now, we know that an exothermic reaction refers to the kind of reaction hat is able to produce heat.
Since the exothermic reaction can be able to produce heat, this is the reaction that we can use to light the reaction between the magnesium and the oxygen so that we can be able to light the thermite.
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Draw the Lewis structure for SF6 and then answer the following questions that follow.
-Do not include overall ion charges or formal charges in your drawing.
Questions:
1). What is the electron-pair geometry for S in SF6?
2). What is the shape (molecular geometry) of SF6?
SF6 molecular geometry will be octahedral because if we look at the structure sulphur hexafluoride has a central sulphur atom around which12 electrons or 6 electron pairs are present and there are no lone pairs.
What is SF6?Sulphur hexafluoride – also known as SF6 – is a ‘greenhouse gas’ that has long played a part in global warming, similar to that of carbon dioxide (CO2).CO2 has been a focal point of climate change for many years. Released from the burning of fossil fuels and other carbon-intensive practices, it creates a cover that traps heat from the sun in the earth’s atmosphere, warming the planet and the oceans. This is what’s known as the ‘greenhouse effect’.SF6 also has this effect, but is much more potent than CO2. Today, wider understanding of the potency of this gas – and the need to reach net zero carbon emissions by 2050 in order to tackle climate change – is causing a rethink of its use.To learn more about ‘greenhouse effect’ refer to:
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whats the mass of 7.60×1020 H2O2 molecules
The mass of 7.60 × 10²⁰ hydrogen peroxide molecules is 0.043 grams.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles by the molar mass of the substance as follows:
mass = molar mass × no of moles
However, the number of moles of a substance can be calculated by dividing the number of molecules of a substance by Avogadro's number;
no of moles = 7.60 × 10²⁰ ÷ 6.02 × 10²³
no of moles = 1.26 × 10-³ moles
molar mass of hydrogen peroxide = 34g/mol
mass = 34g/mol × 0.00126 moles
mass = 0.043 grams
Therefore, 0.043 grams is the mass of the hydrogen peroxide.
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F. According to the rules for naming compounds that you learned in this course, what is the
chemical name of this new product? What is its common name? (2 points)
Molecular compounds are termed by using the stem of the first element's name plus the suffix -ide, followed by the second element. Numerical prefixes are used to specify the number of atoms in a molecule.
What does "chemical common name" mean?The IUPAC defines a common name as one that clearly identifies a chemical but does not adhere to the current systematic naming convention. Acetone, which bears the scientific term, serves as an illustration of a common name. 2-propanone
What is the short answer to chemical?A chemical is any substance whose composition is known. A chemical always consists of the same "substance," to put it another way. Water is one of the substances found in nature.
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Draw the Lewis structure for PF3Cl2 in the window below and then answer the questions that follow. What is the electron-pair geometry for P in PF3Cl2 ? What is the the shape (molecular geometry) of PF3Cl2?
Sp[tex]3[/tex] hybridization of a molecule with two lone pairs is present. This molecule's geometry is determined by its electron pair structure. If more than one bond angle is possible, separate each one with a space.
What is hybridization?The process of combining two atomic orbitals to produce a new variety of hybridized orbitals is described as hybridization. Usually, this mixing creates hybrid orbitals with entirely different energies, shapes, and other characteristics. Atomic orbitals with the same energy level are primarily responsible for hybridization. However, if the energies of the orbitals are equal, the process can involve both fully filled and partially filled orbitals. We can better understand bond formation, bond energies, and bond lengths by using the hybridization concept, which is an extension of valence bond theory. During the hybridization process, which primarily entails the merging of two orbitals, two "p" orbitals, or the mixing of a "s" orbital with a "p," the atomic orbitals of comparable energies are mixed together.To learn more about valence bond theory refer to:
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Study the diragram below which point is a mid ocean ridge most likely to form can you guys help me
Most likely the mid ocean ridge happens at point A.
What are mid ocean ridges?
A continuous system of underwater volcanoes that encircles the planet like seams on a baseball and stretches for approximately 65,000 kilometres is known as the mid-ocean ridge system (40,390 miles). The system is mostly submerged, with water reaching the top of the ridge on average at a depth of 2,500 meters (8,200 feet).
From the given diagram it can be seen the above description fits in point A
Therefore Most likely the mid ocean ridge happens at point A
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If the density of solid chromium is 7.15 g/cm3 , what is the packing efficiency of Cr if it adopts a body‑centered cubic unit cell? The molar mass of Cr is 51.996 g/mol .
The packing efficiency of Chromium atom is 68.8 %.
What is the volume of the Chromium atom?
The volume of the chromium atom is calculated by applying the following equation.
V = M / ρ
where;
M is the molar mass of the Chromium atomρ is the density of the Chromium atomV = ( 51.996 g ) / ( 7.15 g/cm³)
V = 7.27 cm³
The radius of the atom for a body‑centered cubic unit cell is calculated as follows;
V = (2) x (4/3 πr³)
V = (8πr³)/3
8πr³ = 3V
r³ = 3V / 8π
r = (3V / 8π)^¹/₃
r = (3 x 7.27 / 8π)^¹/₃
r = 0.95 cm
The volume of the unit cell is calculated as;
Vc = (4r/√3)³
Vc = (4 x 0.95 / √3)³
Vc = 10.56 cm³
The packing efficiency of Chromium atom is calculated as;
= volume of the atom / volume of unit cell x 100%
= (7.27 cm³ / 10.56 cm³) x 100%
= 68.8 %
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which list contains only strong acids? (5 points) a. hcl, hno3, hf, hclo4 b. h2so4, h3po4, hclo4, nh3 c. hno3, h2so4, naoh, h3po4 d. hcl, hno3, h3po4, hclo4 e. hcl, h2so4, hclo4, hi
a. hcl, hno3, hf, hclo4 b. h2so4 list contains only strong acids.
Chloric acid, hydrochloric acid, hydrochloric acid, hydroiodic acid, nitric acid, perchloric acid, and sulfuric acid are the 7 main acids. These are strong acids since they can completely dissociate in water. A strong acid is described as an acetone that completely disintegrates when added to water. Because the hydrochloric acid inside the preceding example donates every one of its protons to the remedy and totally dissolves, it is classified as a strong acid.
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Diazomethane is a toxic yellow gas that is both sensitive and explosive: However, it is a useful reagent in the laboratory to make key intermediates by reacting with carboxylic acids in a quick and clean reaction_ Draw the expected organic product of diazomethane with the following carboxylic acid. COOH Hc N=N; CH3
Methyl esters are created when carboxylic acids and diazomethane interact. Diazomethane is used to create methyl esters and has a high degree of reactivity.
Diazomethane reacts swiftly and extremely effectively, producing just N2 as a byproduct, making it an appealing alkylating agent for carboxylic and phenols (Black, 1983). As it responds, its inherent yellow color releases, automatically indicating the status of the reaction. Methyl esters are created when carboxylic acids and diazomethane interact. Diazomethane is created in-situ and then interacted with the carboxyl group right away to create the methyl ester due to its high reactivity. Diazomethane has mostly been used to transform carboxylic acids into esters (diazoalkales) that may be examined using GC/MS or HPLC-MS. In etherate solutions, methyl esters can be produced at room temperature quickly, thoroughly, and quantitatively.
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A buffer solution is prepared that is 0.18 M NH3 and 0.27 M NH4Cl. What is the pH of this buffer? Kb for NH3 is 1.8 x 10-5
The correct answer is: 9.08
Can someone explain how to do this for me?
The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the pH of this buffer is 5.14. pH is a unitless quantity.
What is pH?pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.
0.18 M =NH₃
0.27 M= NH₄Cl.
Kb of NH₃ = 1.8 × 10⁻⁵
pKb = - log (kb)
= - log (1.8 × 10⁻⁵)
= 4.74
Using Henderson equation
pH = Pkb +ln [ NH₄Cl ]/ [NH₃]
= 4.74 + ln (0.27 /0.18)
= 5.14
Therefore, the pH of this buffer is 5.14.
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The periodic properties of elements are directly related to the A: group position, B: effective nuclear charge , C: energy levels ,D: Atomic Finite boundaries. ,choose the correct answer
The periodic properties of elements are directly related to the energy levels of the atoms of the elements.
The correct option is C.
What are the periodicity elements in the periodic table?The periodicity of elements in the periodic table is the regular variation of the properties of the elements in the periodic table both down the group and across the periodic.
The properties of elements that show periodicity include;
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calculate the volume in liters of a mm silver(ii) oxide solution that contains of silver(ii) oxide . round your answer to significant digits.
The volume of the solution is 1.84 × [tex]10^{4}[/tex] L.
The formula used to get the molarity of the solution is used to determine the volume of the solution:
Molarity= [tex]\frac{Mass of the solute}{molar mass of solute * Volume of solution(in L)}[/tex]
We are given:
Molarity of solution = 8.75 × [tex]10^{-5}[/tex] M
Given the mass of silver (II) oxide = 200 g
Molar mass of silver (II) oxide = 124 g/mol
Put the values in the formula:
8.75 × [tex]10^{-5}[/tex][tex]10^{-5}[/tex] = [tex]\frac{200}{124* Volume}[/tex]
Volume= 1.84 × [tex]10^{4}[/tex] M
A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The most used molarity unit in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units.
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How many grams of nitrogen gas are needed to completely react with 2.8 moles of hydrogen?
The amount of grams of nitrogen gas needed to completely react with 2.8 moles of hydrogen is 26.13 grams.
How to calculate mass?Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, nitrogen gas completely reacts with 2.8 moles of hydrogen as follows:
N₂ + 3H₂ → 2NH₃
Based on the above equation, 1 mole of nitrogen gas reacts with 3 moles of hydrogen. This means that 2.8/3 moles = 0.933 moles of nitrogen will react with 2.8 moles of hydrogen.
moles = mass ÷ molar mass
mass = 0.933 moles × 28 = 26.13g
Therefore, 26.13 grams of nitrogen gas is required to react completely.
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(d) Caesium is another element in Group 1 of the Periodic Table.
(i) The table below lists some statements about the reaction of caesium with
cold water compared to the reaction of lithium with cold water.
Place ticks (✓) in the boxes to show the two correct statements.
the reaction with caesium is more vigorous
the reaction with caesium produces a different gas
the reaction with caesium produces an acidic solution
the reaction with caesium produces a different compound
the reaction of caesium is endothermic
Answer: The reaction with caesium is more vigourus.
The reaction with caesium produces different compund.
Explanation:
Cold water and cesium react to produce hydrogen gas and a mixture of cesium and hydroxide ions as byproducts.
this is the chemical formula for cassiterite (tin ore): a geochemist has determined by measurements that there are moles of tin in a sample of cassiterite. how many moles of oxygen are in the sample? round your answer to significant digits.
There are two moles of oxygen in cassiterite (tin ore), SnO2, for every mole of tin. As a result, if we have 13 moles of tin, we should have 13 * 2 moles of oxygen. This results in 26 moles of oxygen.
Cassiterite (SnO2) is the most essential tin ore, and it is frequently located in granite veins, granite pegmatites, and greisen. The name is derived from the Greek kassiteros, which means tin.
Cassiterite is a tin oxide mineral with the chemical formula SnO2. It is the primary significant source of tin, accounting for the majority of the world's supply. Primary cassiterite is found in trace amounts in igneous and metamorphic rocks all over the world. It is a mineral that can be found in soils and sediments. Cassiterite is more resistant to deterioration than many other minerals, so it is found in stream and shoreline sediments. Colors include black, brownish black, reddish brown, brown red, yellow, gray, and white.
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Please help with this:
Typically, hard water used in a lab class would have been prepared by adding 1 gram of
magnesium sulfate per liter of distilled water. Magnesium sulfate contains 20.2%
magnesium ions by mass. What is its hardness in grains per gallon (GPG)? (One GPG
equals 17.1 mg/L.)
One grain of calcium carbonate, or 64.8 milligrams, is dissolved in one US gallon of water to represent one grain per gallon (gpg), a measure of water hardness (3.785412 L).
What is Water Hardness Measurement Scales?Understanding your test findings necessitates familiarity with the many water hardness testing scales that are employed. The majority of results are provided as a number that indicates the amount of calcium carbonate or calcium carbonate equivalents present in a specific unit of water. Depending on the measurement method, this value may be given in grains per gallon (gpg), parts per million (ppm), or milligrammes per litre (mg/L).Per Gallon of Grains Measurement of water hardnessThe hardness scale, expressed in gpg of calcium carbonate, can be seen as follows, according to the Water Quality Association:Soft is defined as gpg less than 1.An intermediate level of difficulty is between 1 and 3.5 gpg.The category of fairly challenging ranges from 3.5 to 7 gpg.The hard range is between 7 and 10.5 gpg.It's regarded quite difficult to get above 10.5 gpg.To Learn more About grain per gallon refer to:
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which of the following has the lowest conductivity? a. 0.1 m cuso4 b. 0.1 m koh c. 0.1 m bacl2 d. 0.1 m hf e. 0.1 m hno3
The following has the lowest conductivity are the bacl2 that is 0.1 m as bacl2 is not good electrolyte.
Therefore BaCl2·2H2O is a great selec- tion for growing a polymer electrolyte in addition to for right ionic conductivity results.The molar conductivities at countless dilution of barium chloride, sulphuric acid and hydrochloric acid are 280, 860 and 426 S cm2 mol–1 respectively.
BaCl2 can not behavior energy in fused kingdom due to the fact charged debris can not flow in the crystal. BaCL2 is less in conductivity as it has not any of the conductive character and thus cannot definitely says about the conductive.
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