1: 99 percent / 5percent H2SO4 / 5 h / Heating 2: 1.) NaOH 2.) HCl / 1.) water, reflux, 4h 2.) reflux, 2h 3: 96 percent / NaOH / H2O / 15 h / Heating 4: 1.) 2N NaOH 2.) 6N H2SO4 / 1.) ice bath, 2h 5: 40 percent / H2O / 36 h / 37 °C View Scheme

1: 99 percent / 5percent H2SO4 / 5 h / Heating 2: 1.) NaOH 2.) HCl / 1.) water, reflux, 4h 2.) reflux, 2h 3: 96 percent / NaOH / H2O / 15 h / Heating 4: 1.) 2N NaOH 2.) 6N H2SO4 / 1.) ice bath, 2h 5: 40 percent / H2O / 36 h / 37 °C View Scheme

sulfuric acid 5 h; Heating;