Mg(OH)2 ------------- Mg2+ +2(OH)-
Solubility product=[Mg2+][OH-]2
Let the conc of Mg2+= x
So (OH-) =2x
So we have;
5×1012=(x)(2x)2
5×1012=4x3
x3=1.25×1012
x=1.08×104
Therefore the Solubility of Mg(OH)2=1.08×104
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Sir ,thanks a lot .you make easy my work.
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