Edexcel IAL Chemistry A2 17.28 V2O5 catalyst in the Contact process
Edexcel IAL Chemistry A2 17.28 V2O5 catalyst in the Contact process
Write the two-step catalyst cycle: sulfur dioxide reduces V2O5 to V2O4, then oxygen reoxidises V2O4 back to V2O5 while sulfur trioxide forms.
How this is tested
- Write catalyst-cycle equations for V2O5 reduced by SO2 and V2O4 reoxidised by O2.
- State the vanadium oxidation number cycle as +5 to +4 and back to +5 in V2O5.
- Identify sulfuric acid manufacture as the process using a V2O5 catalyst.