2K2MnO4 + 2H2O ± 2e- → H2 + 2KMnO4 + 2KOH
Electrolysis aqueous solution potassium manganate to produce hydrogen, potassium permanganate and potassium hydroxide.
- Cathodic process: 2H2O + 2e- → H2 + 2OH-
- Anodic process: 2MnO42- - 2e- → 2MnO4-