What is the equation for the dehydration of CuSO4 5H20?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter13: Chemical Equilibrium
Section: Chapter Questions
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POST-LABORATORY QUESTIONS
Due after Laboratory Experiment
1. What is the equation for the dehydration of CuSO4 · 5H20?
2. A student dehydrated a sample of hydrate incompletely. Explain how the incomplete
dehydration of the hydrate affects the calculation of the percent of water of hydration.
What should the student do?
3. To the cooled anhydrate, CUSO4, of Part I, a student added about 5 mL of distilled
water and then stirred the mixture with a stirring rod. When the student carefully
touched the outside of the evaporating dish, do you expect the student to feel hot of
cold? Is the rehydration an exothermic or endothermic process?
4. A student had a sample of CaCl2 • nH2O. He heated the sample until the mass did not
change. From this data, calculate (a). the percentage of CaCl2 in the original sample
and (b). the formula of the hydrate
NOT ROUND
Mass of crucible + cover = 28.39 g T
Mass of crucible + cover + sample = 30.41g
Mass of crucible + cover + residue = 29.75
5. The chemical analysis of a binary hydrate shows that it is composed of 27.76% Mn,
35.82% Cl and 36.41% H2O.
a. What is the formula of the hydrate?
b. What is the name of the hydrate?
www.
Transcribed Image Text:POST-LABORATORY QUESTIONS Due after Laboratory Experiment 1. What is the equation for the dehydration of CuSO4 · 5H20? 2. A student dehydrated a sample of hydrate incompletely. Explain how the incomplete dehydration of the hydrate affects the calculation of the percent of water of hydration. What should the student do? 3. To the cooled anhydrate, CUSO4, of Part I, a student added about 5 mL of distilled water and then stirred the mixture with a stirring rod. When the student carefully touched the outside of the evaporating dish, do you expect the student to feel hot of cold? Is the rehydration an exothermic or endothermic process? 4. A student had a sample of CaCl2 • nH2O. He heated the sample until the mass did not change. From this data, calculate (a). the percentage of CaCl2 in the original sample and (b). the formula of the hydrate NOT ROUND Mass of crucible + cover = 28.39 g T Mass of crucible + cover + sample = 30.41g Mass of crucible + cover + residue = 29.75 5. The chemical analysis of a binary hydrate shows that it is composed of 27.76% Mn, 35.82% Cl and 36.41% H2O. a. What is the formula of the hydrate? b. What is the name of the hydrate? www.
Expert Solution
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The balanced chemical reaction equation is 

CuSO4(s) + 5H₂O(l)→ CuSO4.5H₂O(s)

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ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning