MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumSalt Hydrolysis
The Ksp of Mg(OH)2 is 1 10 x . 0.01 Mg(OH)2 will precipitate at the limited pH
A.3
B.9✓ Correct
C.5
D.8
Explanation
Given, Ksp of Mg(OH)2 = 12 1 10 x Concentration of Mg(OH)2 = 0.0038 2 2 Mg(OH) Mg 2OH 2 2 sp K Mg OH or 2 12 1 10 0.01 OH x x 2 4 SO IONIC EQUILIBRIUM 49 or 2 10 OH 1 10 x or 5 OH 1 10 x Again, from 14 H OH 10 or 5 14 H 1 10 10 x or 14 9 5 10 H 10 10 9 pH log H pH log10 9 Mg(OH)2 will precipitate at limited place.
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