4 FeSO4 (aq) → 2 Fe2O3 (s) + 4 SO2 (aq) + O2 (g)
This is an oxidation-reduction (redox) reaction:
4 SVI + 8 e- → 4 SIV (reduction)
4 FeII - 4 e- → 4 FeIII (oxidation)
2 O-II - 4 e- → 2 O0 (oxidation)
FeSO4 is an oxidizing agent, FeSO4 is a reducing agent, FeSO4 is a reducing agent.
This is a precipitation reaction: Fe2O3 is the formed precipitate.
This is a gas evolution reaction, O2 is the formed gas.
- FeSO4 – Iron(II) sulphate
- 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.]
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]