• question_answer If solubility product of $Z{{r}_{3}}{{\left( P{{O}_{4}} \right)}_{4}}$ is denoted by ${{K}_{sp}}$ and its molar solubility is denoted by S, then which of the following   relation between S and ${{K}_{sp}}$  is correct ? A) $S={{\left( \frac{{{K}_{sp}}}{216} \right)}^{\text{1/7}}}$                   B) $S={{\left( \frac{{{K}_{sp}}}{6912} \right)}^{\text{1/7}}}$ C) $S={{\left( \frac{{{K}_{sp}}}{144} \right)}^{\text{1/6}}}$                   D) $S={{\left( \frac{{{K}_{sp}}}{929} \right)}^{\text{1/9}}}$

$Z{{r}_{3}}{{(P{{O}_{4}})}_{4}}$ ${{K}_{sp}}={{(3S)}^{3}}{{(4S)}^{4}}$ $\Rightarrow$ ${{K}_{sp}}=6912{{S}^{7}}$ $S={{\left( \frac{{{K}_{sp}}}{6912} \right)}^{1/7}}.$