AQA GCSE Chemistry
Fundamental Ideas in Chemistry
Atoms, elements, compounds, formulae, equations and the foundations of chemistry.
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Top Tips
- Memorise the gas tests
- When describing a gas test, always give the test and then result
- Rf must always be between 0 and 1
Additional Resources
📘 Specification
AQA GCSE: Chemical Analysis
The official specification covering pure substances, formulations,
chromatography and the tests for hydrogen, oxygen, carbon dioxide
and chlorine.
🧪 Purity
Seneca: Pure & Impure Substances
Free interactive revision on chemical purity and using melting
and boiling points to distinguish pure substances from mixtures.
🧴 Formulations
Seneca: Formulations
Explore how useful products are made from carefully measured
mixtures, with examples including medicines, paints, fuels,
cleaning products, alloys and fertilisers.
🧠 Interactive Revision
Seneca: Chromatography
Free interactive revision explaining stationary and mobile phases,
separation of mixtures, interpreting chromatograms and identifying
substances.
📏 Chromatograms & Rf
Chemguide: Paper Chromatography
A visual guide with videos explaining paper chromatography,
the practical method, interpreting spots and calculating and
using Rf values.
💨 Gas Tests
Chemguide: Collecting & Testing Gases
A clear guide to identifying hydrogen, oxygen, carbon dioxide
and chlorine using their characteristic chemical tests, with
additional information on collecting gases in the laboratory.
🎲 Quiz
Generate a 10-question quiz on Metals.
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Exam Practice
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⭐ Challenge
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Challenge questions, Grade 8–9 tasks and mastery badges can go here later.