Chemistry GCSE
Purity testing
What Purity testing means in Chemistry GCSE, as defined for AQA.
Definition of Purity testing
Check what you remember
Read the wording for your board, then hide it and explain Purity testing in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Melting point and boiling point data can be used to test purity, as a substance that melts sharply at the expected temperature is likely to be pure.
Topics that use Purity testing
- Pure substances (AQA GCSE)
Related terms
- Comparison with known values
- Context in scientific language
- Effect of impurities on physical properties
- Everyday versus chemical meaning
- Evidence-based conclusions
- Melting and boiling point data
- Melting and boiling points
- Mixture
Using Purity testing in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge