The solubility of Mg(OH)2 in a particular buffer solution is 0.66g/L .

Question

What must be the pH of the buffer solution?

Answer 1

Mg(OH)2 ==> Mg2+ + 2OH-
Ksp = (Mg2+)(OH-)^2
Look up Ksp, (Mg2+) = M = moles/L and moles = 0.66 g/molar mass.
Sove for OH- and convert to pH.

Answer 2

Thanks a ton!!:D

Answer 3

DrBob is right for once