Chapter 17, Problem 107AE

Interpretation Introduction

Interpretation:

The expression of the solubility product constant written by the student of a given salt is to be proved wrong.

Concept introduction: The solubility product of ${\text{Mg}}_3{\left({\text{AsO}}_{\text{4}}\right)}_2$ is given by the formula,

$K_{\text{sp}}={\left[{\text{Mg}}^{2+}\right]}^3\times {\left[{\text{AsO}}_{\text{4}}{}^{3-}\right]}^2$

To determine: The mistake in using the solubility product expression, $\left[M{g}^{2+}\right]=1.5\left[{\text{AsO}}_{\text{4}}{}^{3-}\right]$ .