Edexcel IAL Chemistry A2 11.3 Selecting rate-monitoring techniques
Edexcel IAL Chemistry A2 11.3 Selecting rate-monitoring techniques
Identify what changes continuously and measurably, then choose colorimetry, gas collection, mass loss or timed sampling only when that signal tracks reaction progress.
How this is tested
- Choose colorimetry when a coloured species changes concentration during reaction.
- Use gas volume or mass loss only when the stoichiometric change produces a measurable signal.
- Distinguish continuous monitoring from quench-and-titrate sampling methods.