For which of the following sparingly soluble salt, the solubility (s) and solubility product `(K_(sp))` are related by the expression `s=(K_(sp)//4)^(1//3)?`

Options

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

Answer

C

Explanation

`Hg_(2)Cl_(2) harr Hg_(2)""^(2+)`
`" "K_(sp)=[Hg_(2)""^(2+)][Cl^(-)]^(2)`
`" "=(s)(2s)^(2)`
`" "K_(sp)=4s^(3)`
`" "s=((K_(sp))/4)^(1//3)`