You must show calculations in to receive credit. 1. A 6.245 g sample of a hydrate has a mass loss of 2.525 g upon heating. Calculate the percent water by mass in the hydrate and identify the hydrate using the chart in the laboratory procedure. % water Hydrate 2. A hydrate weighed 8.456 g before heating and after heating the anyhydrous compound weighed 5.725 g. Calculate the percent water by mass in the hydrate and using the chart in the laboratory procedure identify the hydrate. % water Hydrate 3. Using the table on the previous page, calculate the mass loss expected when 25.527 g of CaSO4 2H20 are heated.

You must show calculations in to receive credit. 1. A 6.245 g sample of a hydrate has a mass loss of 2.525 g upon heating. Calculate the percent water by mass in the hydrate and identify the hydrate using the chart in the laboratory procedure. % water Hydrate 2. A hydrate weighed 8.456 g before heating and after heating the anyhydrous compound weighed 5.725 g. Calculate the percent water by mass in the hydrate and using the chart in the laboratory procedure identify the hydrate. % water Hydrate 3. Using the table on the previous page, calculate the mass loss expected when 25.527 g of CaSO4 2H20 are heated.

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

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 151AE: A 0.755-g sample of hydrated copper(II) sulfate CuSo4xH2O was heated carefully until it had changed...

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3a. Another student performed the same percent composition of a hydrate experiment, but kent the crucible completely covered throughout the entire experiment. What effect would this have on the experiment? Cor 3b. Would the student's calculated percent water in the hydrate be high, low, or unaffected? Explain why or why not.
composition of water in a hydrate, we need to look at our equation. compare it to your experimental values you just obtained in lab. To calculate the percent In this exercise, we are going to calculate the percent composition of water in a hydrate and percent (%) composition = of water mass of water х 100 mass of entire hydrate For LINO3 3H2O (lithium nitrate trihydrate) we have to calculate the mass of each element. Nelice the three in front of the water will give us a total of six hydrogens and three oxygens. Li: 1x 6.94 g/mol N: 1x 14.01 g/mol H: 6x 1.01 g/mol О: 3х 16.00 g/mol O: 3x 16.00 g/mol 54.06 g/mol go l00 68.95 g/mol percent (%) composition = of water 3 H20 х 100 LINO3 · 3H20 percent (%) composition = of water 54.06 g/mol х 100 (68.95 g/mol + 54.06 g/mol) percent (%) composition of water in LINO3 • 3 H20 = 43.9 % 1. Calculate the percent composition of water in the following hydrates: (show all work) ZnSO, 7H20 M9SO 7H20 BaCl2 2H20 There are additional questions on the…