Concentration of the `Ag^(+)` ions in a saturated solution of `Ag_2C_2O_4` is `2.2 xx 10^(-4)` mol `L^(-1)`. Solubility product of `Ag_2C_2O_4` is:

Options

A. `5.3xx10^(-12)`
B. `2.42xx10^(-8)`
C. `2.66xx10^(-12)`
D. `4.5xx10^(-11)`

Answer

A

Explanation

`Ag_2C_2O_4 rarr underset(2s)(2Ag^(+))+underset(s)(C_2O_4)`
`K_(sp)=[Ag^(+)]^2[C_2O_4]`
`=(2s)^2(s), [Ag^(+)=2.2xx10^(-4)]`
`=(2.2xx10^(-4))^2(1.1xx10^(-4)), [2s=2.2xx10^(-4)]`
`=4.84xx10^(-8)xx1.1xx10^(-4)`
`=5.3xx10^(-12)`