Edexcel IAL Chemistry A2 17.8 colour in aqueous and complex ions
Edexcel IAL Chemistry A2 17.8 colour in aqueous and complex ions
For colour questions, link the ligand or ion to a changed d-orbital energy gap, then use the colour wheel to connect absorbed light with the colour seen.
How this is tested
- Explain colour from d-orbital splitting and absorption of visible light.
- Use complementary colours and wavelength ranges from a given colour wheel.
- Compare colours by ligand or ion changes that alter the d-orbital energy gap.