Appeared in: 2025 (2 sets)
(a) One mole of $\text{CrCl}_3 \cdot 4\text{H}_2\text{O}$ precipitates one mole of $\text{AgCl}$ when treated with excess of $\text{AgNO}_3$ solution. Write (i) the structural formula of the complex, and (ii) the secondary valency of $\text{Cr}$.