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3. Calculate AG for the dissolution of Ca(OH)2 at room temperature and 100 °C.

3. Calculate AG for the dissolution of Ca(OH)2 at room temperature and 100 °C.

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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Data Table: Room Temperature Saturated Solution (25 °C) 100 °C Saturated Solution Volume of saturated, filtered Ca(OH)2 solution that was titrated with HCI 5.0 mL 5.0 mL Volume of HCl solution Concentration of HCI solution used in titration required in the titration to reach the equivalence point 19.5 mL 10.6 mL 0.0120 M 0.0120 M Questions/Calculations: 1. Based on the titration data (but without really having to do any calculations yet), is the calcium hydroxide more soluble in the room temperature water or the 100 °C temperature water? Explain your reasoning. 2. Calculate the molar solubility and then the Ksp value for Ca(OH)2 at room temperature and 100 °C using the titration data. 3. Calculate AG for the dissolution of Ca(OH)2 at room temperature and 100 °C. 4. Assuming they are constant with temperature, calculate AH° and AS° for the dissolution of calcium hydroxide in water. 5. Using the standard thermodynamic values in the Appendix, calculate the theoretical values of AH°, AS°, and AG for the reaction of Ca(OH)2 dissolving in water. Discuss the sign of each and what it tells you about this reaction.
Transcribed Image Text:Data Table: Room Temperature Saturated Solution (25 °C) 100 °C Saturated Solution Volume of saturated, filtered Ca(OH)2 solution that was titrated with HCI 5.0 mL 5.0 mL Volume of HCl solution Concentration of HCI solution used in titration required in the titration to reach the equivalence point 19.5 mL 10.6 mL 0.0120 M 0.0120 M Questions/Calculations: 1. Based on the titration data (but without really having to do any calculations yet), is the calcium hydroxide more soluble in the room temperature water or the 100 °C temperature water? Explain your reasoning. 2. Calculate the molar solubility and then the Ksp value for Ca(OH)2 at room temperature and 100 °C using the titration data. 3. Calculate AG for the dissolution of Ca(OH)2 at room temperature and 100 °C. 4. Assuming they are constant with temperature, calculate AH° and AS° for the dissolution of calcium hydroxide in water. 5. Using the standard thermodynamic values in the Appendix, calculate the theoretical values of AH°, AS°, and AG for the reaction of Ca(OH)2 dissolving in water. Discuss the sign of each and what it tells you about this reaction.
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