Chemistry@BGS

Bourne Grammar School

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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

  • H+ + OH- → H2O
  • Reactions involving ammonia (NH3) only produce a salt (no water)
  • Dilute by factor 10 = +1 to pH

Additional Resources

📘 Specification
AQA GCSE Chemistry: Reactions of Acids
The official specification covering reactions of acids, salt preparation, pH, neutralisation, titrations and strong and weak acids.
📖 Topic Guide
Chemguide: Acids, Bases & Salts
A comprehensive free topic hub covering pH, indicators, salts, reactions of acids with metals, bases and carbonates, salt preparation and acid-base theory.
🧠 Interactive Revision
Seneca: Acids & Alkalis
Free interactive revision on acids, alkalis, hydrogen ions, hydroxide ions, neutralisation and the pH scale.
🧪 Practical Chemistry
Chemguide: Making Soluble Salts
Step-by-step practical guidance on preparing soluble salts using acids with metals, metal oxides and hydroxides, including filtration, crystallisation and titration methods.
🌈 pH & Indicators
Chemguide: pH and Indicators
Explore the pH scale, acidity and alkalinity, common indicators and the tenfold change associated with each whole pH unit.
🔬 Required Practical
Seneca: Titration
Free interactive revision of the Chemistry-only required practical, including burette and pipette use, indicators, the end point and determining reacting volumes accurately.
🚀 Higher / Extend
Seneca: Strong & Weak Acids
Develop your understanding of complete and partial ionisation, the difference between acid strength and concentration, and why equally concentrated acids can have different pH values.

🎲 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.

📝 Questions
Acids Past-Paper Questions
Selected AQA exam questions covering the Acids topic.
✅ Mark Scheme
Acids Mark Scheme
Check your answers using the corresponding AQA mark scheme.

⭐ Challenge

Coming Soon

Challenge questions, Grade 8–9 tasks and mastery badges can go here later.