Chemistry

Problem

Solid

\text{Al(OH)}_3

dissolves according to the equilibrium

\text{Al(OH)}_3(s) \rightleftharpoons \text{Al}^{3+}(aq)+3\text{OH}^-(aq).

Which of the following expressions represents the solubility product constant

K_{sp}

for this reaction? a)

K_{sp}=[\text{Al}^{3+}][\text{OH}^-]^2

K_{sp}=\dfrac{[\text{Al}^{3+}][\text{OH}^-]^3}{[\text{Al(OH)}_3]}

K_{sp}=[\text{Al}^{3+}][\text{OH}^-]^3

K_{sp}=[\text{Al}^{3+}]+3[\text{OH}^-]