2KMnO4 + 2H2SO4 → Mn2O7 + 2KHSO4 + H2O
Potassium permanganate react with sulfuric acid to produce manganese(VII) oxide, potassium bisulfate and water. Potassium permanganate - solid. Sulfuric acid - 98% solution. The reaction proceeds at room temperature. Impurities: manganese(IV) oxide MnO2.