First slide

Solubility product(KSP)

Question

Let the solubility of an aqueous solution of Mg(OH)₂ be 'x'; then its K_sp is

Easy

A

4x³
B

108x⁵
C

27x⁴
D

9x

Solution

$\large Mg{\left( {OH} \right)_2}\left( s \right) \rightleftharpoons \mathop {Mg{{\left( {OH} \right)}_2}}\limits_x \left( {aq} \right)\xrightarrow{{}}\mathop {M{g^{ + 2}}}\limits_x \left( {aq} \right) + \mathop {2O{H^ - }}\limits_{2x} \left( {aq} \right)$
$\large {K_{sp}} = x \times {\left( {2x} \right)^2} = 4{x^3}$

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