Equilibrium Question 904

Question: The solubility product of Mg(OH)2 is 1014 . The solubility of Mg(OH)2 in a buffer solution of pH=8 is

Options:

A) 108

B) 106

C) 102

D) 104

Show Answer

Answer:

Correct Answer: C

Solution:

Mg(OH)2,Mg2+,+2OH

Ksp=[Mg2+][OH]2

1×1014=[Mg2+],[106]2

pH=8

[H+]=108,mol,L1 . and [OH]=106molL1]

[Mg2+]=10141012=102mol,L1

Solubility [Mg2+]=102,molL1



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