AQA GCSE Chemistry
Fundamental Ideas in Chemistry
Atoms, elements, compounds, formulae, equations and the foundations of chemistry.
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Notes
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Top Tips
- Be clear on when we are using atom economy and when we are using percentage yield
- You need to be able to both describe a titration and do the calculations for a titration
- Make sure you recap Y10 Quantitative Chemistry before this topic
Additional Resources
📚 Recap
📘 Specification
AQA GCSE: Further Quantitative Chemistry
The official Chemistry-only requirements for percentage yield,
atom economy, reaction pathway selection, concentrations in
mol/dm³, gas volumes and quantitative titration calculations.
🧮 Calculation Guide
Chemguide: Chemistry Calculations
A free calculations hub with step-by-step guides to gas volumes,
solution concentrations, titrations, atom economy and other
quantitative chemistry calculations.
🎈 Gas Volumes
Chemguide: Calculations Involving Gases
Explore Avogadro's law, the 24 dm³ molar gas volume at RTP
and step-by-step calculations linking masses, moles, balanced
equations and volumes of gases.
🧴 Concentration
Chemguide: Calculations Involving Solutions
Review concentration in g/dm³ and mol/dm³, converting between
volume units and using concentration, volume and balanced
equations to calculate chemical quantities.
🎬 Titration Practical
RSC: Simple Titration
Watch a complete acid–base titration, including correct burette
preparation, a rough titration, accurate repeats, identifying
the end-point and recording reliable results.
✏️ Practise
📊 Yield Practice
Seneca: Percentage Yield Calculations
Free interactive questions calculating theoretical and actual
yields and percentage yield, with practice applying the ideas
to different reactions.
♻️ Atom Economy Practice
Seneca: Atom Economy Calculations
Interactive practice calculating atom economy from balanced
equations and applying it when considering the efficiency and
sustainability of different reaction pathways.
🎈 Gas Calculation Practice
Seneca: Moles & Gas Volumes
Test yourself on equal gas volumes, the molar gas volume at RTP
and calculations involving the mole ratios and volumes of
gaseous reactants and products.
🧪 Concentration Practice
Seneca: Concentrations & Amounts
Free adaptive and open-ended questions linking moles, masses,
solution volumes and concentrations for more demanding
quantitative chemistry practice.
🚀 Extend
🎓 A Level: Gases
Chemguide: The Ideal Gas Equation
Discover where the GCSE molar gas volume leads next by exploring
ideal gases, kinetic theory and the equation pV = nRT, including
pressure, temperature and gas-volume calculations.
🎓 A Level: Titrations
Chemguide: Titration Curves
Go beyond finding a single end-point and explore how pH changes
throughout strong and weak acid–base titrations, including
equivalence points, buffers and the shapes of titration curves.
🎓 16–18 Challenge
RSC: Comparing Solution Concentrations
Develop A Level quantitative skills with 16–18 activities
involving mol/dm³ and g/dm³, unit conversions and calculations
linking mass, amount of substance and solution volume.
🎲 Quiz
Generate a 10-question quiz on Metals.
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Exam Practice
Apply your knowledge to exam-style questions and past-paper material.
⭐ Challenge
Coming Soon
Challenge questions, Grade 8–9 tasks and mastery badges can go here later.