Question

What is the correct representation for the solubility product of $SnS_2$ ?

• A. $[Sn^{2+}] [S^{2-}]^2$
• B. $[Sn^{4-}] [S^{2-}]^2$
• C. $[Sn^{2+}] [2S^{2-}]$
• D. $[Sn^{4+}] [S^{2-}]^2$

Answer 1

Answer: (D)

The solubility equilibrium of $SnS_{2}$ is
$SnS_{2} \rightleftharpoons Sn^{4+}+2S^{2-}$
Solubility product $K_{sp}=[Sn^{4+}] [S^{2-}]^{2}$