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 all calculations necessary to answer the following questions. Show 1.28 What was the mass of the hydrate sample? 25.050- 23.122 1. g hydrate 0.729 What is the mass of the anhydrous COSO4? 25.050-24,32 2. g COSO How much water was driven off? 3. g H2O What is the percentage of water in the hydrate? 4. mass of water in sample % Н.О % water = X 100 mass of hydrate sample How many grams of water would there be in 100.0 g of hydrate? How many moles? 5. moles H,O g H,O

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 all calculations necessary to answer the following questions. Show 1.28 What was the mass of the hydrate sample? 25.050- 23.122 1. g hydrate 0.729 What is the mass of the anhydrous COSO4? 25.050-24,32 2. g COSO How much water was driven off? 3. g H2O What is the percentage of water in the hydrate? 4. mass of water in sample % Н.О % water = X 100 mass of hydrate sample How many grams of water would there be in 100.0 g of hydrate? How many moles? 5. moles H,O g H,O

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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