Ionic EquilibriumHard
Question
The solubility of A2X3 is y mol dm–3. It solubility product is
Options
A.6y4
B.64y4
C.36y4
D.108y5
Solution
$A_{2}X_{3}(s) \rightleftharpoons \underset{2yM}{2A^{3 +}} + \underset{3yM}{3X^{2 -}}$
$K_{sp} = \left\lbrack A^{3 +} \right\rbrack^{2}\left\lbrack X^{2 -} \right\rbrack^{3} = (2y)^{2}.(3y)^{3} = 108y^{5}$
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