Question

The correct relationship between solubility and $K_{sp}$ of $A{g}_{2}C{O}_3$ is:

• A. $K_{sp}=S^2$
• B. $K_{sp}=4S^3$
• C. $K_{sp}=27S^4$
• D. $K_{sp}=S$

Answer 1

The correct option is B $K_{sp}=4S^3$

$A{g}_{2}C{O}_3\leftrightharpoons 2A{g}^{+}+C{O}_3^{-2}$
1 0 0
1-S 2S S

$K_{sp}=\left[A{g}^{+}{]}^2\right[C{O}_3^{-2}]=(2S{)}^2\left(S\right)=4S^2\times S=4S^3$