Solubility of $M_{2} S$ salt is $3.5 imes 10^{-6}$ then find out solubility product.\

Question

Solubility of $M_{2} S$ salt is $3.5 	imes 10^{-6}$ then find out solubility product.\

Professor PC Thomas Classes · Answer

(b) : For reaction, $M_{2} \mathrm{~S} ightleftharpoons \underset{2 s}{2 \mathrm{M}^{+}+\mathrm{S}^{2-}}$ Solubility $=3.5 	imes 10^{-6}$\ Solubility product, $K_{s p}=\left[M^{+}ight]^{2}\left[\mathrm{~S}^{2-}ight]$\ $=(2 s)^{2} s=4 s^{3}=4 	imes\left(3.5 	imes 10^{-6}ight)^{3}=1.7 	imes 10^{-16}$\