Question

Solubility of ${Hg}_2{Cl}_2$ in water is $S$ mol ${litre}^{-1}$. The $K_{sp}$ of ${Hg}_2{Cl}_2$ is:

• A. $16S^4$
• B. $4S^3$
• C. $64S^4$
• D. $16S^2$

Answer 1

The correct option is B $4S^3$

$H{g}_{2}C{l}_2\to H{g}_2^{2+}+2C{l}^{-}$

$S$ $2S$

$k_{sp}=\left[H{g}_2^{2+}\right]\times \left[C{l}^{-}\right]=\left(S\right)(2S{)}^2=4S^3$

Hence, option B is correct.