The numerical value of a solubility product `K_(sp)` is measured by experiment.For example, we could determine `K_(sp)` for `CaSO_(4)` by adding on excess of solid `CaSO_(4)` to water, stirring the mixture to give a saturated solution of `CaSO_(4)` and then measuring the concentration of `Ca^(2+)` and `SO_(4)^(-)` in the saturated solution. Value of `K_(sp)` are unaffected by the presence of other ions in soluiotn. At `27^(@)C` experiemntal value of `K_(sp)` is `2.4 xx 10^(-5) M^(2)`.
Solubility of `CaSO_(4)` solution in 0.02M aqueous `Ca(NO_(3))_(2)` solution

Options

A. `1.2 xx 10^(-3)M //` litre
B. `1.02 xx 10^(-3) g m //` litre
C. `3.6 xx 10^(-3)` M `//` litre
D. `4.9 xx 10^(-3)` M `//` litre

Answer

A