Answers accurate to 3 or 4 significant figures & show your work. Q. 2) A 20.00-g sample of a mixture containing CuSO+•5H2O and BaCl2•2H2O is heated to drive off all water from the two hydrates. The remaining residue containing CuSO4 and BaCl2 weighed 14.15 g. Show how you determine the percent by mass of each of the two hydrates in the original mixture. You must show your work!

Answers accurate to 3 or 4 significant figures & show your work. Q. 2) A 20.00-g sample of a mixture containing CuSO+•5H2O and BaCl2•2H2O is heated to drive off all water from the two hydrates. The remaining residue containing CuSO4 and BaCl2 weighed 14.15 g. Show how you determine the percent by mass of each of the two hydrates in the original mixture. You must show your work!

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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Part a) When FeS3 • 2H2O is heated, it gives off water, SO2 and Fe2O3. Is this a chemical or physical change? When CuSO4 • 5H2O is heated, it gives off water and CuSO4. Is this a chemical or physical change? Which of these changes can be easily reversed? Part b) Is the molar ratio of the products is different from the molar ratio in the hydrate formula, has a chemical or physical change taken place?
A student performed a similar experiment to the one you performed: They took a crucible and lid, cleaned them, heated them over a flame, and after cooling found their combined mass to be 22.538 g. The student then added a sample of zinc(II) sulfate hydrate (ZnSO4·“n”H2O) to the crucible so the combined mass of the sample, crucible, and lid was 25.896 g. They heated this sample for 10 minutes with the lid ajar, let it cool, and measured the mass of the crucible, sample, and lid to be 25.054 g. a. Based on this experiment, what is the formula for they hydrated zinc(II) sulfate compound? b. The student later looked on the reagent bottle for zinc(II) sulfate hydrate and found the actual formula was ZnSO4·7H2O. If everything had been done correctly, what value should the student have expected for the final mass of their sample, crucible, and lid after heating?
Aa.103.