Question

If the solubility of a sparingly soluble salt $A{X}_2$ is $smol/L$, the solubility product is

• A. $4s^3$
• B. $8s^3$
• C. $4s^2$
• D. $s^2$

Answer 1

Answer: (A)

$A{X}_2{A}_s^{2+}+2{\underset{2s}{}}^{-}$
$K_{Sp}=\left[A^{2+}\right]{\left[X^{-}\right]}^2$
$K_{Sp}=(s)(2s{)}^2$
$K_{Sp}=(s)\left(4s^2\right)$
$K_{Sp}=4s^3$