Question

Solubility of salt $A_2{B}_3$ is $1\times {10}^{-4}$, its solubility product is:

• A. $1.08\times {10}^{20}$
• B. $1.08\times {10}^{18}$
• C. $2.6\times {10}^{-18}$
• D. $1.08\times {10}^{-18}$

Answer 1

The correct option is D $1.08\times {10}^{-18}$

Solubility of salt $A_2{B}_3$ is $1\times {10}^{-4}$,

$A_2{B}_3\to 2A^{+3}+3B^{-2}$

2S 3S

It's solubility product $=\left(2S{)}^2\right(3S{)}^3=108S^5=108\times {10}^{-20}=1.08\times {10}^{-18}$