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6. How many grams of CoSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is CoSO,? Convert the mass of CoSO, to moles. The molar mass of Coso, is 154.996 g. g CoSO, moles CoSO, % CoSO, in hydrate 7. How many moles of water are present per mole of CoSO,? moles H,O/moles CoSO, 8. What is the formula of the hydrate?

6. How many grams of CoSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is CoSO,? Convert the mass of CoSO, to moles. The molar mass of Coso, is 154.996 g. g CoSO, moles CoSO, % CoSO, in hydrate 7. How many moles of water are present per mole of CoSO,? moles H,O/moles CoSO, 8. What is the formula of the hydrate?

Chemical Principles in the Laboratory
Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter6: Properties Of Hydrates
Section: Chapter Questions
Problem 1ASA: A student is given a sample of a pink manganese (II) chloride hydrate. She weighs the sample in a...
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I know that the mass of the hydrate sample is 1.628 g, the mass of the anhydrous CoSO4 is 0.899 g CoSO4 and the water driven off was 0.729 g H2O. I need to know how to do numbers 6-8? I don't know how to solve this problem. I have 1-5 done. 

Water of Hydration 4. What is the percentage of water in the hydrate? mass of water in sample % water = mass of hydrate sample x100 % H¸O 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? - g H,O; moles H,O 6. How many grams of CoSo, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is CoSO,? Convert the mass of CoSo, to moles. The molar mass of CoSO, is 154.996 g. g CoSO; moles CoSO, % CoSO, in hydrate 7. How many moles of water are present per mole of CoSO,? moles H,O/moles CoSO, 8. What is the formula of the hydrate? 62
Transcribed Image Text:Water of Hydration 4. What is the percentage of water in the hydrate? mass of water in sample % water = mass of hydrate sample x100 % H¸O 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? - g H,O; moles H,O 6. How many grams of CoSo, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is CoSO,? Convert the mass of CoSo, to moles. The molar mass of CoSO, is 154.996 g. g CoSO; moles CoSO, % CoSO, in hydrate 7. How many moles of water are present per mole of CoSO,? moles H,O/moles CoSO, 8. What is the formula of the hydrate? 62
A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated 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 let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous CoSO,. Show all calculations necessary to answer the following questions. 1. What was the mass of the hydrate sample? g hydrate 2. What is the mass of the anhydrous CoSO,? g CoSO, 3. How much water was driven off? g H,O 61 I
Transcribed Image Text:A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated 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 let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous CoSO,. Show all calculations necessary to answer the following questions. 1. What was the mass of the hydrate sample? g hydrate 2. What is the mass of the anhydrous CoSO,? g CoSO, 3. How much water was driven off? g H,O 61 I
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