CuSO4 + 2KCN -> CuCN↓ + 1/2(CN)2↑ + K2SO4 — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Identify starting materials: CuSO4 and KCN are both highly soluble salts in aqueous solution. Step 2: Analyze the reaction: Mixing these solutions initially forms unstable copper(II) cyanide, which rapidly undergoes a redox reaction to form insoluble cuprous cyanide (CuCN↓) and cyanogen gas ((CN)2↑). Step 3: Since a solid precipitate (CuCN↓) is formed from soluble starting materials, this is classified as a precipitate formation reaction (type A).