For which of the following sparingly soluble salt, the solubility (S) and solubility product `(K_(sp))` are related by the expression : `S= [(K_(sp))/(3)]^(1//2)`

Options

A. `BaSO_(4)`
B. `Ca_(3)(PO_(4))_(2)`
C. `Hg_(2)Cl_(2)`
D. `Ag_(3)PO_(4)`

Answer

C

Explanation

`underset(s )(Hg_(2)Cl) rarr underset(s)(Hg_(2)^(2+)) + underset(2s)(2Cl^(-)) , K_(sp) =[Hg_(2)^(2+)][Cl^(-)]^(2) = [S][2S]^(2) = 4S^(3), S = [(K_(sp))/(4)]^(1//3)`