HCN is a weak acid (Ka = 6.2 × 10–10). is a weak base (Kb = 1.8 × 10–5). A 1M solution of would be : — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

4 4 2 HCN NH OH NH CN H O 4 NH CN undergo both cationic and anionic hydrolysis and pH is calculated as per the formula a b w 1 pH = pK pK pK 2 w pK 14 a pK 9.21 b pK 4.74 Thus, pH = 9.2 (weakly basic)