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Chem The Formula of a Hydrate Calculate the percent water in cobalt(II) chloride hexahydrate, CoCl 6H2O....
2. Calculate the percent water in the following hydrates. A. MgSO4 7H2O B. Cobalt (II) chloride hexahydrate
2. Calculate the percent water in the following hydrates. A. MgSO4 7H2O B. Cobalt (II) chloride hexahydrate
Suppose 0.250 g of cobalt(II) chloride hexahydrate is dissolved in 50.0 ml of 4 M HCl,...
Suppose 0.250 g of cobalt(II) chloride hexahydrate is dissolved in 50.0 ml of 4 M HCl, and heated to 80°C in a cuvette having 1.00 cm path length. At this temperature, the percent transmittance of the solution at 690 nm is measured to be 48.0%. What is the molar mass of cobalt(II) chloride hexahydrate? Select one: a) 129.84 g/mol b) 237.93 g/mol c) 58.93 g/mol d) 165.87 g/mol
1. CoCl2*6H2O reacting with ammonium chloride, ammonia, and hydrogen peroxide to form hexaamminecobalt(III) chloride and water...
1. CoCl2*6H2O reacting with ammonium chloride, ammonia, and hydrogen peroxide to form hexaamminecobalt(III) chloride and water 2. cobalt (II) nitrate hexahydrate reacting with ammonium carbonate, concentrated ammonia, and hydrogen peroxide and water to form [Co(NH3)4CO3]NO3 Both synthesis above include hydrogen peroxide. What is the purpose of this hydrogen peroxide? Could we use a different cobalt starting material and skip the addition of hydrogen peroxide?
answer qeustions please Show all work for full credit. 1. Complete the following table. For each of the hydrates:...
answer qeustions please
Show all work for full credit. 1. Complete the following table. For each of the hydrates: 1) write the chemical formula; 2) calculate the formula mass; and 3) calculate the mass percentage of water. Hydrate Chemical Formula Fomula Mass Mass % Water Nickel(II)chloride hexahydrate Cobalt(II) chloride hexahydrate Copper(II)sulfate pentahydrate 2. A student dehydrated an unknown hydrate. The mass of the compound was initially 4.139. After heating, the mass was 3.52 g. a. Calculate the mass percentage of...
Magnesium chloride commonly occurs as a hexahydrate. a. (5 pt) Write the chemical formula for magnesium...
Magnesium chloride commonly occurs as a hexahydrate. a. (5 pt) Write the chemical formula for magnesium chloride hexahydrate. (10 pt) Calculate the formula weight for magnesium chloride hexahydrate. Express your answer in atomic mass units to the nearest hundreth of an amu Show your work. b. 0.01 amu). (10 pt) Calculate the percent by mass of magnesium chloride in magnesium chloride hexahydrate. Express your answer in % as three significant digits. Show your work. c. (10 pt) Calculate the percent...
A hydrate of Cobalt(ii)Chloride had mass of 166.04g before heating. After heating, the anhydrous CoCl2 weighed...
A hydrate of Cobalt(ii)Chloride had mass of 166.04g before heating. After heating, the anhydrous CoCl2 weighed 130.9g. - what is the mass of the water that was driven off? - how many moles of water were driven off? - how many moles of anhydrous CoCl2 remain? - what is the hydration number (moles of water per mole compound)?
1. When cobalt chloride is added to pure water, the Co2+ ions hydrate. The hydrated form then...
1. When cobalt chloride is added to pure water, the Co2+ ions hydrate. The hydrated form then reacts with the Cl–ions to set up the equilibrium shown here: Co(H2O)62+ + 4Cl– CoCl42– + 6H2O (pink) (blue) Which statement describes the change that the system will undergo if potassium chloride is added? A) It should become more pink. B) Nothing will change. C) The silver ion will react with the CoCl42–. D) Water will be produced. E) It should become more blue.
A 6.2351 g sample of an unknown hydrate of cobalt(II) bromide is heated until all the...
A 6.2351 g sample of an unknown hydrate of cobalt(II) bromide is heated until all the water of hydration is removed. The CoBr2 that remains has a mass of 5.0000 g. 1. How many moles of CoBr2 are in the sample? mol 2. How many grams of water were lost in the dehydration? g 3. How many moles of water were lost? (mol) 4. What is the value of "n" in the formula CoBr2 · n H2O? (1, 2, 3,...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
8. A 4.00 gram sample of a hydrate of nickel(II) bromide loses 0.793 grams of water...
8. A 4.00 gram sample of a hydrate of nickel(II) bromide loses 0.793 grams of water when heated. Determine the mass percent water in the hydrate and the formula of the hydrate. 9. A 2.500 gram sample of a hydrate of calcium sulfate loses 0.523 grams of water when heated. and the fomula of the hydrate Determine the mass percent of water in the hyd rate and the formula of the hydrate.
2. Calculate the percent water in the following hydrates. A. MgSO4 7H2O B. Cobalt (II) chloride hexahydrate
answer qeustions please
Show all work for full credit. 1. Complete the following table. For each of the hydrates: 1) write the chemical formula; 2) calculate the formula mass; and 3) calculate the mass percentage of water. Hydrate Chemical Formula Fomula Mass Mass % Water Nickel(II)chloride hexahydrate Cobalt(II) chloride hexahydrate Copper(II)sulfate pentahydrate 2. A student dehydrated an unknown hydrate. The mass of the compound was initially 4.139. After heating, the mass was 3.52 g. a. Calculate the mass percentage of...
Magnesium chloride commonly occurs as a hexahydrate. a. (5 pt) Write the chemical formula for magnesium chloride hexahydrate. (10 pt) Calculate the formula weight for magnesium chloride hexahydrate. Express your answer in atomic mass units to the nearest hundreth of an amu Show your work. b. 0.01 amu). (10 pt) Calculate the percent by mass of magnesium chloride in magnesium chloride hexahydrate. Express your answer in % as three significant digits. Show your work. c. (10 pt) Calculate the percent...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
8. A 4.00 gram sample of a hydrate of nickel(II) bromide loses 0.793 grams of water when heated. Determine the mass percent water in the hydrate and the formula of the hydrate. 9. A 2.500 gram sample of a hydrate of calcium sulfate loses 0.523 grams of water when heated. and the fomula of the hydrate Determine the mass percent of water in the hyd rate and the formula of the hydrate.
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