For which of the following salt, the solubility s =(Ks /108)1/5 , where ks is the solubility product of the salt?

For which of the following salt, the solubility $s = {(K_{s} / 108)}^{1 / 5}$ , where $k_{s}$ is the solubility product of the salt?

A
${Ag}_{2} {CO}_{3}$
B
$Al (OH)_{3}$
C
${Ca}_{3} {({PO}_{4})}_{2}$
D
$Ba (OH)_{2}$

Solution:

The exponent $1 / 5$ implies that ions are obtained from the ionization of salt, the salt is ${Ca}_{3} {({PO}_{4})}_{2}$ .

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