2KBr + 3H2SO4
2KHSO4 + Br2 + SO2 + 2H2O
Potassium bromide react with sulfuric acid to produce potassium bisulfate, bromine, sulfur dioxide and water. Potassium bromide - solid. Sulfuric acid - concentrated solution, with concentration of over 50%. This reaction takes place at a temperature of 40-60°C. Impurities: sulfur S.