Dish D 2 MnO 4-+ H+ + 5 HSO 3-→ 2 Mn 2+ + 5 SO 4 2-+ 3 H 2O Safety: Wear proper protective equipment including gloves and safety glasses when preparing and performing this demonstration. Care should be taken when using strong acids or bases as contact may cause burns. MnO 2 is a strong oxidizing agent. read more