can exist as a hydrated complex. 1.0 molal aqueous solution has depression in freezing point of . As — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Using $\Delta T_f = i \times K_f \times m$, we get $3.72 = i \times 1.86 \times 1.0 \Rightarrow i = 2$. This means the complex dissociates into exactly 2 ions per formula unit. The option $[\text{Pt(H}_2\text{O)}_3\text{Cl}_3]\text{Cl} \cdot 3\text{H}_2\text{O}$ correctly provides one complex cation and one chloride anion, totaling 2 ions. Therefore, correct answer is C.