5 SO3 + 2 P → P2O5 + 5 SO2
This is an oxidation-reduction (redox) reaction:
2 P0 - 10 e- → 2 PV (oxidation)
5 SVI + 10 e- → 5 SIV (reduction)
P is a reducing agent, SO3 is an oxidizing agent.
Reactants:
Products:
- P2O5
- 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.]