Edexcel IAL Chemistry A2 14.16 Select suitable titration indicators
Edexcel IAL Chemistry A2 14.16 Select suitable titration indicators
Compare the indicator range or pKind with the steep part of the titration curve, then justify the colour change and reject ranges outside the endpoint.
How this is tested
- Choose an indicator whose pH range lies within the curve's vertical section.
- Justify the choice with Data Booklet pH ranges, pKind values or endpoint colours.
- Explain why mixed indicators can obscure the endpoint when colours overlap.