Chapter 6, Problem 6.19P

Interpretation Introduction

Interpretation:

• Without precipitating ${\text{Ag}}^{\text{+}}$ can $\text{99\%}$ of ${\text{Ca}}^{\text{2+}}$ be precipitated by sulphate has to be explained.
• $\left[{\text{Ca}}^{\text{2+}}\right]$ when ${\text{Ag}}_{\text{2}}{\text{SO}}_{\text{4}}$ initiates to precipitate has to be explained.

Concept introduction:

Solubility product ${\text{(K}}_{\text{sp}}\text{)}$: It is defined as the product formed from mathematical product of its concentration of dissolved ion raised up to the power of their stoichiometric coefficient.

$\begin{array}{l}{\text{M}}_{\text{y}}{\text{X}}_{\text{z(s)}}\stackrel{}{\rightleftharpoons }{\text{yM}}^{\text{z+}}{}_{\text{(aq)}}{\text{+zX}}^{\text{y-}}{}_{\text{(aq)}}\\ \\ K_{sp}={\left[{\text{M}}^{\text{z+}}\right]}^y{\left[{\text{X}}^{\text{y-}}\right]}^{\text{z}}\end{array}$