Edexcel IAL Chemistry A2 17.25 chelate stability and entropy
Edexcel IAL Chemistry A2 17.25 chelate stability and entropy
Use the substitution equation, not a vague stability claim: count particles before and after ligand exchange and link the positive ΔSsystem to feasibility.
How this is tested
- Count particles in ligand substitution equations to justify positive ΔSsystem.
- Explain EDTA or salen stability through multidentate binding and entropy increase.
- Compare ligand choices by the number of coordinate bonds and particles released.