Make the reasoning behind a reaction or calculation easier to follow.
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| Paper | Main areas | Time | Marks |
|---|---|---|---|
| 1 | Relevant physical chemistry, inorganic chemistry and practical skills | 2 hours | 105 |
| 2 | Relevant physical chemistry, organic chemistry and practical skills | 2 hours | 105 |
| 3 | All content and practical skills | 2 hours | 90 |
Papers 1 and 2 each contribute 35%, with Paper 3 contributing 30%. In calculations, a tutor can ask you to identify the chemical relationship before substituting values. In organic chemistry, you might explain the movement of electrons before drawing the arrows. Talking through those choices can reveal a misconception that is hidden in copied notes.
Amount of substance
Follow the units and explain the ratio in the equation. Check the chemical meaning of each numerical step.
Organic mechanisms
Identify the reacting species, the bond changes and the reason for each arrow. Compare reactions that look similar.
Interpreting evidence
Combine observations or analytical information to justify a conclusion. State which evidence supports each part of your answer.
Yes. Share the mechanisms or synthesis questions you are studying and ask the tutor how they would connect new reactions to what you already know.
No. They can support practical understanding and written questions, while supervised practical work and the endorsement remain with your school or centre.
Use the free 15-minute introduction to identify one immediate priority and a way of checking progress. A question you attempted yourself is particularly useful.
Further reading: AQA Chemistry 7405. Course information checked in September 2026. Confirm your specification and entry details with your school or college.
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