In which of the following, the solubility of \(\mathrm{AgCl}\) will be minimum?
In which of the following, the solubility of \(\mathrm{AgCl}\) will be minimum?
\(0.1 \mathrm{M} \mathrm{KNO}_3\)
\(0.1 \mathrm{M} \mathrm{KCl}\)
\(0.2 \mathrm{M} \mathrm{KNO}_3\)
Water
Solution
Solubility of \(\mathrm{AgCl}\) in \(0.1 \mathrm{M} \mathrm{KCl}\) will be less because of common ion effect of \(\mathrm{Cl}^{-}\)
\(\begin{aligned}
& \mathrm{AgCl} \rightleftharpoons \mathrm{Ag}^{+}+\mathrm{Cl}^{-\prime} \quad \text{(Common ion)} \\
& \mathrm{KCl} \rightleftharpoons \mathrm{K}^{+}+{ }^{\prime} \mathrm{Cl}^{-}{ }^{\prime} \\
\end{aligned}\)
Hence, option (2) is correct.