Edexcel IAL Chemistry A2 16.12 limitations of standard electrode predictions
Edexcel IAL Chemistry A2 16.12 limitations of standard electrode predictions
Do not treat a standard E°cell value as the whole answer: explain how concentrated acid, ion removal or activation energy can change the observed reaction.
How this is tested
- Explain how concentrated HCl can shift dichromate equilibria and alter Ecell.
- Use precipitation or ion removal to justify a reaction despite standard potential data.
- Separate thermodynamic feasibility from kinetic limits such as activation energy.