In which of the following, solubility of AgCl will be maximum? — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

AgCl is a sparingly soluble salt. In pure water, its solubility is governed strictly by its $K_{sp}$. In $\text{AgNO}_3$ and NaCl, the common ion effect (from $\text{Ag}^+$ and $\text{Cl}^-$ respectively) significantly decreases its solubility. However, in aqueous $\text{NH}_3$, $\text{Ag}^+$ ions react to form a highly stable soluble complex ion, $[\text{Ag(NH}_3)_2]^+$, pulling the dissolution equilibrium forward and drastically increasing the solubility.