The electrochemical cell shown below is a concentration cell
$\mathrm{M}\left|{\mathrm{M}}^{2+}\left(\begin{array}{l}\text{ saturated solution }\\ \text{ of sparingly soluble }\\ \text{ salt,},{\mathrm{MX}}_2\end{array}\right)\right|\left|\right|{\mathrm{M}}^{2+}\left(0.001 \mathrm{mol} {\mathrm{dm}}^{-3}\right)\mid \mathrm{M}$
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 0.059V.