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The molar solubility of Cd(OH) 2 is 1.84 × 10 –5 M in water. The expected solubility of Cd(OH) 2 in a buffer solution of pH = 12 is :

1. 2.49 × 10 –10 M
2. 1.84 × 10 –9 M
3. 6.23 × 10 –11 M
4. 84 . 1 49 . 2 × 10 –9 M

Correct answer: 2.49 × 10 –10 M

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