4 CuFeS2 + 13 O2 → 2 Fe2O3 + 4 CuO + 8 SO2
This is an oxidation-reduction (redox) reaction:
8 S-II - 48 e- → 8 SIV (oxidation)
4 FeII - 4 e- → 4 FeIII (oxidation)
26 O0 + 52 e- → 26 O-II (reduction)
CuFeS2 is a reducing agent, CuFeS2 is a reducing agent, O2 is an oxidizing agent.
Reactants:
- CuFeS2
- O2
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.]
- CuO – Copper(II) oxide
- 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.]