The choice of a suitable indicator for an acid–base titration depends on the strength of the acid and base. An appropriate choice of indicator needs to show a sharp colour change (end-point) at the equivalence point of the titration.
After working through this topic you should be able to:
- explain what is meant by an indicator and how it works;
- appreciate students’ difficulties with choosing a suitable indicator and access activities that can help;
- use effective strategies and practical activities to support students’ understanding;