Edexcel IAL Chemistry A2 17.23 amphoteric hydroxides and ionic equations
Edexcel IAL Chemistry A2 17.23 amphoteric hydroxides and ionic equations
Separate the reaction types: hydroxide formation is deprotonation, excess alkali shows amphoteric behaviour, and excess ammonia often gives ligand exchange.
How this is tested
- Recognise amphoteric hydroxides dissolving in both strong acid and strong alkali.
- Write zinc or chromium hydroxide equations that form soluble hydroxo complexes.
- Distinguish deprotonation from ligand exchange in NaOH and NH3 reactions.