Question

Solubility of $Ca(OH{)}_2$ is $smol{L}^{-1}$ . The solubility product $(K_{sp})$ under the same condition is

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

Answer 1

Answer: (A)

$Ca(OH{)}_2\rightleftharpoons C{a}^{2+}+2O{H}^{-}$

$K_{sp}=\left[C{a}^{2+}\right]{\left[O{H}^{-}\right]}^2$

$=(s)(2s{)}^2=4s^3$