Question

For a sparingle soluble salt $A_p{B}_q$. the relationship of its solubility product $\left(L_s\right)$ with its solubility (S) is:

• A. $L_s=S^{p+q}{p}^p{q}^q$
• B. $L_s=S^{p+q}{p}^q{q}^p$
• C. $L_s=S^{pq}{p}^p{q}^q$
• D. $L_s=S^{pq}(pq{)}^{p+q}$

Answer 1

The correct option is A $L_s=S^{p+q}{p}^p{q}^q$

$A_p{B}_q\to p{A}^{+q}+q{B}^{-p}$

pS qS

$K_{sp}=\left(pS{)}^p\right(qS{)}^q=p^p{q}^q{S}^{p+q}$