A saturated solution of Mg(OH)2 (K_sp = 1.6 x 10^-11) with excess solid is at 298 K. Choose the correct statement(s).

Adding solid NaOH lowers the solubility of Mg(OH)2

Adding dilute HCl increases the amount of Mg(OH)2 that dissolves

In a solution of pH 12 the solubility is 1.6 x 10^-7 M

Adding solid NaOH lowers the solubility of Mg(OH)2

Adding dilute HCl increases the amount of Mg(OH)2 that dissolves

In a solution of pH 12 the solubility is 1.6 x 10^-7 M

Adding NaOH decreases the value of K_sp

JEE Main levelOne or more correct optionsDifficulty 2 of 3ie198

A saturated solution of $Mg (OH) X_{2}$ ( $K_{s p} = 1.6 \times 1 0^{- 11}$ ) with excess solid is at 298 K. Choose the correct statement(s).

OH X^{-}

is a common ion, so

NaOH

suppresses dissolution, while

HCl

removes

OH X^{-}

and pulls the equilibrium to the right. At pH 12,

[OH X^{-}] = 0.01 M

and

s = K_{s p} / (0.01)^{2} = 1.6 \times 1 0^{- 7} M

K_{s p}

changes only with temperature.