Edexcel IAL Chemistry A2 17.20 chromium redox changes and E values
Edexcel IAL Chemistry A2 17.20 chromium redox changes and E values
Use E values and oxidation-number changes to decide whether chromium species are oxidised or reduced, then connect the product to its colour and balanced equation.
How this is tested
- Use E values to decide whether Cr3+ is oxidised to dichromate or chromate.
- Identify chromium colours such as orange dichromate, yellow chromate and green Cr3+.
- Write balanced chromium redox equations from Data Booklet half-equations.