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1) When the sample is first put into the crucible and heated, the directions say to heat gently for the first five minutes. why do you suppose this is important?     2) Suppose that some of the compounds spilled out of the crucible after it was heated. Would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? Briefly explain your answer.     3) The unknown compounds used in this experiment are the following compounds. Based on your experimental results, what is the identity of the unknown compound you used? Show all calculations needed. Compound: CaSO4. 2H2O, MgSO4.7H2O, BaCl2.2H2O, ZnSO4.7H2O

1) When the sample is first put into the crucible and heated, the directions say to heat gently for the first five minutes. why do you suppose this is important?     2) Suppose that some of the compounds spilled out of the crucible after it was heated. Would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? Briefly explain your answer.     3) The unknown compounds used in this experiment are the following compounds. Based on your experimental results, what is the identity of the unknown compound you used? Show all calculations needed. Compound: CaSO4. 2H2O, MgSO4.7H2O, BaCl2.2H2O, ZnSO4.7H2O

Chemistry
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
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1) When the sample is first put into the crucible and heated, the directions say to heat gently for the first five minutes. why do you suppose this is important?

 

 

2) Suppose that some of the compounds spilled out of the crucible after it was heated. Would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? Briefly explain your answer.

 

 

3) The unknown compounds used in this experiment are the following compounds. Based on your experimental results, what is the identity of the unknown compound you used? Show all calculations needed.

Compound: CaSO4. 2H2O, MgSO4.7H2O, BaCl2.2H2O, ZnSO4.7H2O

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