Edexcel IAL Chemistry A2 17.26 homogeneous and heterogeneous catalysts
Edexcel IAL Chemistry A2 17.26 homogeneous and heterogeneous catalysts
The direct evidence is narrow: compare catalyst phase, surface action and examples such as solid d-block catalysts or transition-metal ions in solution.
How this is tested
- Compare homogeneous and heterogeneous catalysts by phase relative to reactants.
- Use transition-metal examples such as solid MoO3, WO3, Re or ions in solution.