2 KMnO4 (aq) + 10 FeSO4 (aq) + 7 H2O (l) → 5 Fe2O3 (s) + 2 MnSO4 (aq) + K2SO4 (aq) + 7 H2SO4 (aq)
This is an oxidation-reduction (redox) reaction:
2 MnVII + 10 e- → 2 MnII (reduction)
10 FeII - 10 e- → 10 FeIII (oxidation)
KMnO4 is an oxidizing agent, FeSO4 is a reducing agent.
Reactants:
Products:
- Fe2O3 – Iron(III) oxide
- Other names: Ferric oxide , Hematite , Ferric iron
- Appearance: Red-brown solid ; Reddish brown-to-black crystals or powder ; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] ; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.]
- MnSO4 – Manganese(II) sulfate
- K2SO4
- H2SO4 – Sulfuric acid