Question

MnO4– + SO32– + H2O → MnO2 + SO42– + OH–

How many molecules of water (H2O) are required to balance the equation?

Answer 1

H2O + 2 MnO4:- + 3 SO3:2- → 2 MnO2 + 3 SO4:2- + 2 OH:-

Answer 2

MnO4– + SO32– + H2O → MnO2 + SO42– + OH