The electrochemical cell shown below is a concentration cell. M|M2+ (saturated solution of a sparingly soluble salt, MX2)||M2+ (0.001mol dm−3)|M
The emf of the cell depends on the difference in concentrations of M2+ions at the two electrodes. The emf of the cell at 298 K is 0.059 V.
The solubility product (Ksp;mol3dm−9) of MX2 at 298 K based on the information available for the given concentration cell is (take 2.303 X R X 298/F = 0.059 V)