The salt is involved in the following two equilibria: Zn ( OH )_2(s) Zn ^ 2+ (aq.) +…

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

The salt Zn(OH)2\text{Zn}(\text{OH})_2 is involved in the following two equilibria: Zn(OH)2(s)⇌Zn2+(aq.)+2OH−(aq.)Ksp=1.2×10−17\text{Zn}(\text{OH})_2(s) \rightleftharpoons \text{Zn}^{2+}(aq.) + 2\text{OH}^-(aq.) \quad K_{sp} = 1.2 \times 10^{-17} Zn(OH)2(s)+2OH−⇌Zn(OH)42−(aq.)Kf=0.12\text{Zn}(\text{OH})_2(s) + 2\text{OH}^- \rightleftharpoons \text{Zn}(\text{OH})_4^{2-}(aq.) \quad K_f = 0.12 Calculate the [OH−][\text{OH}^-] at which solubility of Zn(OH)2\text{Zn}(\text{OH})_2 be a minimum. Also find the solubility of Zn(OH)2\text{Zn}(\text{OH})_2 at this pH.

Related theory

Browse the problem library