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# The molar solubility of

Question:

The molar solubility of $\mathrm{Cd}(\mathrm{OH})_{2}$ is $1.84 \times 10^{-5} \mathrm{M}$ in water. The expected solubility of $\mathrm{Cd}(\mathrm{OH})_{2}$ in a buffer solution of $\mathrm{pH}=12$ is :

1. $6.23 \times 10^{-11} \mathrm{M}$

2. $1.84 \times 10^{-9} \mathrm{M}$

3. $\frac{2.49}{1.84} \times 10^{-9} \mathrm{M}$

4. $2.49 \times 10^{-10} \mathrm{M}$

Correct Option: , 4

Solution: