Redox Reactions and Electrochemistry: JEE Main 2026 Chemistry question

MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K. $\mathrm{MX(s)\rightleftharpoons M^+(aq)+X^-(aq)}$; $K_{sp}=10^{-10}$ If the standard reduction potential for $\mathrm{M^+(aq)\xrightarrow{+e^-}M(s)}$ is $\left(E^\ominus_{M^+/M}\right)=0.79$ V, then the value of the standard reduction potential for the metal/metal insoluble salt electrode $E^\ominus_{X^-/MX(s)/M}$ is ______ mV. (nearest integer) [Given : $\frac{2.303RT}{F}=0.059$ V]