What is the solubility of `PbSO_(4)` in `0.01M Na_(2)SO_(4)` solution if `K_(sp)` for `PbSO_(4) = 1.25 xx 10^(-9)`?

Options

A. `1.25xx10^(-7) `mol `L^(-1)`
B. `1.25 xx10^(-9)` mol `L^(-1)`
C. `1.25 xx 10^(-10)` mol `L^(-1)`
D. `0.10` mol `L^(-1)`

Answer

A

Explanation

`[SO_(4)^(2-)]=0.01 mol L^(-1), `
`K_(sp)=[Pb^(2+)][SO_(4)^(2-)]`
or `[Pb^(2+)]=K_(sp)//[SO_(4)^(2-)]=(1.25xx10^(-9))/(0.01)`