chromium(VI) oxide in acetic acid 0.5 h; Ambient temperature;

sodium carbonate in water T=100°C; 2 h; pH 14;

1: 63 percent / 12 h / Heating 2: 23 percent / CrO3 / acetic acid / 0.5 h / 60 °C 3: 20 percent / 1.) 0.1 N Na2CO3; 2.) H2SO4 / 1.) 4 h; 2.) 2 h View Scheme