1: ammonium chloride, 28percent ammonia / H2O / 0.33 h / 42 °C 2: 52 percent / conc. sulfuric acid, acetic anhydride / 1.) ice-cooling, 3 h, 2.) 0 deg C, 12 h View Scheme

ammonium hydroxide; ammonium chloride in water T=42°C; 0.333333 h; Yield given;