6J.13 Consider the two equilibria2+CaF₂(s)Ca²+ (aq) + 2 F¯(aq)F (aq) + H₂O(1) HF (aq) + OH (aq)-11KspKb = 2.9 × 10-¹1= 4.0 × 107(a) Write the chemical equation for the overall equilibrium and calculate the correspondingequilibrium constant. (b) Estimate the solubility of CaF2 at (i) pH = 7.0; (ii) pH = 3.0.

Given: To determine: a) The overall chemical equation b) Solubility of CaF2 at pH=7 pH=3

Answered: Consider the two equilibria CaF2(s)…

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Consider the two equilibria CaF2(s) Ca²+ (aq) + 2F (aq) Ksp = 4.0 × 10-11

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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Question

6J.13 Consider the two equilibria
2+
CaF₂(s)
Ca²+ (aq) + 2 F¯(aq)
F (aq) + H₂O(1) HF (aq) + OH (aq)
-11
Ksp
Kb = 2.9 × 10-¹1
= 4.0 × 107
(a) Write the chemical equation for the overall equilibrium and calculate the corresponding
equilibrium constant. (b) Estimate the solubility of CaF2 at (i) pH = 7.0; (ii) pH = 3.0.

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