MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K.
$$MX(s) \rightleftharpoons M^{+} (aq)+X^{-}(aq); K_{sp}=10^{-10}$$
If the standard reduction potential for $$M^{+}(aq)\xrightarrow {+e^{-}}M(s)$$ and $$\left(E_{M^{+}/M}^\ominus\right)=0.79V$$, 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 : $$\frac{2.303RT}{F} = 0.059V$$]