The correct formula of diammine dichlorodicyano chromate (III) is : — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Identify the constituents of the complex: Chromate (III) indicates Cr^3+. The ligands are two ammine (NH3, neutral), two chloro (Cl^-, -1 charge), and two cyano (CN^-, -1 charge). Step 2: Calculate the net charge of the complex: +3 + 2*(0) + 2*(-1) + 2*(-1) = -1. Step 3: Since the net charge is -1, the formula is [CrCl2(CN)2(NH3)2]^-, corresponding to option (d).