AP Chemistry
7.12 Common-Ion Effect
7.11 Introduction to Solubility Equilibria
7.9 Introduction to Le Châtelier’s Principle
A saturated solution of calcium fluoride is in dynamic equilibrium with undissolved solid at \(25^\circ\text{C}\), as represented by the following equation:
\[\text{CaF}_2(s) \rightleftharpoons \text{Ca}^{2+}(aq) + 2\,\text{F}^-(aq)\]
A student adds a small amount of solid potassium fluoride, \(\text{KF}\), to the mixture at constant temperature. The \(\text{KF}\) dissolves completely. Which of the following statements best predicts and explains the effect of adding \(\text{KF}(s)\) to the mixture?
\[\text{CaF}_2(s) \rightleftharpoons \text{Ca}^{2+}(aq) + 2\,\text{F}^-(aq)\]
A student adds a small amount of solid potassium fluoride, \(\text{KF}\), to the mixture at constant temperature. The \(\text{KF}\) dissolves completely. Which of the following statements best predicts and explains the effect of adding \(\text{KF}(s)\) to the mixture?
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