Question

The solubility of calomel in water at $25^{\circ }$C is $x$ moles/litre. Its solubility product is

• A. $4x^3$
• B. $12x^3$
• C. $108x^5$
• D. $x^2$

Answer 1

Answer: (A)

$H{g}_{2}C{l}_2\rightleftharpoons \underset{\text{x}}{H{g}_2^{+2}}+\underset{\text{2x}}{2C{l}^{-}}$
$K_{sp}=[H{g}_2^{+2}][C{l}^{-}{]}^2=(x)(2x{)}^2$
$=4x^3$