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8. Consider the solubility equilibrium of calcium hydroxide: [10 marks] Ca(OH)2(s) Ca (aq) + 2 OH (aq) and AH,o=-17.6 kJ mol¹ and AS,°=-158.3 JK' mol¹. A saturated calcium hydroxide solution contains 1.2 × 102 M [Ca] and 2.4 × 102 M [OH] at 298 K, which are at equilibrium with the solid in the solution. The solution is quickly heated to 400 K. Calculate the AG, at 400 K with the concentrations, AH,, and AS, given and state whether calcium hydroxide will precipitate or be more soluble upon heating.

8. Consider the solubility equilibrium of calcium hydroxide: [10 marks] Ca(OH)2(s) Ca (aq) + 2 OH (aq) and AH,o=-17.6 kJ mol¹ and AS,°=-158.3 JK' mol¹. A saturated calcium hydroxide solution contains 1.2 × 102 M [Ca] and 2.4 × 102 M [OH] at 298 K, which are at equilibrium with the solid in the solution. The solution is quickly heated to 400 K. Calculate the AG, at 400 K with the concentrations, AH,, and AS, given and state whether calcium hydroxide will precipitate or be more soluble upon heating.

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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8. Consider the solubility equilibrium of calcium hydroxide: [10 marks] Ca(OH)2(s) Ca (aq) + 2 OH (aq) and AH,o=-17.6 kJ mol¹ and AS,°=-158.3 JK' mol¹. A saturated calcium hydroxide solution contains 1.2 × 102 M [Ca] and 2.4 × 102 M [OH] at 298 K, which are at equilibrium with the solid in the solution. The solution is quickly heated to 400 K. Calculate the AG, at 400 K with the concentrations, AH,, and AS, given and state whether calcium hydroxide will precipitate or be more soluble upon heating.
Transcribed Image Text:8. Consider the solubility equilibrium of calcium hydroxide: [10 marks] Ca(OH)2(s) Ca (aq) + 2 OH (aq) and AH,o=-17.6 kJ mol¹ and AS,°=-158.3 JK' mol¹. A saturated calcium hydroxide solution contains 1.2 × 102 M [Ca] and 2.4 × 102 M [OH] at 298 K, which are at equilibrium with the solid in the solution. The solution is quickly heated to 400 K. Calculate the AG, at 400 K with the concentrations, AH,, and AS, given and state whether calcium hydroxide will precipitate or be more soluble upon heating.
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