AQA GCSE chemistry predicted topics 2026 (higher tier triple)
Obviously you need to learn the whole specification. We cannot stress that enough, and students who do best in their exams are always the ones who have revised broadly rather than trying to second-guess the paper.
That said, if you have worked your way through most of your revision and are looking for a way to prioritise the final stretch, it can help to know which topics have been quiet recently. We went through every question on the 2024 and 2025 AQA GCSE Chemistry Higher Tier Triple papers (8462/1H and 8462/2H) and mapped each one back to the specification. A handful of topics have had little or no coverage across both years. If you have a bit of spare time near the end of your revision, those are the ones worth giving a little extra attention.
None of this is insider knowledge and none of it is guaranteed – AQA can test any part of the spec in any year. Think of it as a gentle nudge towards the quieter corners of the course, rather than a shortcut. You have got this.
A handful
of specification topics have had little or no coverage across AQA's 2024 and 2025 Higher Triple Chemistry papers – a nice shortlist to review at the end of your revision
What this analysis covers
AQA publishes its GCSE Chemistry specification with numbered topic references (for example, 4.2.2.1 for states of matter or 4.7.2.3 for cracking). Each exam paper samples from these topics, but there is no requirement to test everything every year.
We compared the 2024 and 2025 Higher Tier Triple papers side by side and flagged any topic that received zero marks or only very brief coverage across both years. Topics that were heavily tested in 2025 – like graphite structure and bonding, the Haber process and compromise conditions, reaction profiles with catalysts, atomic structure and isotopes, nanoparticles, rate of reaction with catalysts and temperature, and flame tests – are much less likely to carry a major question in 2026, so they are not on our list below.
These predictions are based on past paper analysis, not inside knowledge. They are not guarantees. AQA can test any part of the specification in any year, so the whole spec matters. Use this list to guide where you spend any extra time.
Paper 1 topics worth extra attention
Paper 1 covers topics 1 to 5 of the AQA specification: Atomic structure, bonding, quantitative chemistry, chemical changes, and energy changes. The topics below have been quiet across the last two years.
Not seen in either 2024 or 2025 (Paper 1)
| Topic | Spec ref. | What to revise |
|---|---|---|
| States of matter and particle models | 4.2.2.1 | Three states, state symbols, limitations of the particle model, changes of state in terms of energy and particle movement. |
| Diamond and silicon dioxide structures | 4.2.2.6 | Giant covalent structures, why they have high melting points, and the differences between diamond, graphite, and silicon dioxide. Graphite was tested again in 2025, so the focus here is specifically on diamond and silicon dioxide. |
| Electrolysis of aqueous solutions | 4.4.3.4 | Predicting products at each electrode using the reactivity series, half equations for common aqueous setups. (Only molten electrolysis of aluminium oxide appeared in 2025.) |
| Chromatography and distillation as separation techniques | 4.1.1 | How simple and fractional distillation work, how paper chromatography separates mixtures, and how to calculate Rf values. Filtration and crystallisation appeared in 2025 as part of a planning question, but chromatography and distillation specifically did not. |
Quiet or only lightly tested (Paper 1)
| Topic | Coverage so far | What to revise |
|---|---|---|
| Transition metals | Only 2 marks in 2025 (compared with Group 1) | Coloured compounds, use as catalysts, variable oxidation states. Compare properties with Group 1 metals. The 2025 question only asked for two differences – the deeper content around coloured compounds and catalytic behaviour remains a strong candidate. |
| Reacting masses from balanced equations | Partial only in 2025 (atom economy, conservation of mass and percentage yield appeared) | Using relative formula mass and balanced equations to calculate masses of reactants or products. Expect a pure reacting-masses calculation without the atom-economy framing. |
Paper 1 final-stretch checklist
Tick off each topic once you have revised it and attempted at least one practice question.
- States of matter – draw particle diagrams for solids, liquids, and gases
- Diamond and silicon dioxide – compare their structures with graphite
- Electrolysis of aqueous solutions – predict products for NaCl, CuSO4, and H2SO4 solutions
- Chromatography and distillation – describe simple and fractional distillation and calculate Rf values
- Transition metals – list coloured compounds, catalytic uses, and variable oxidation states
- Reacting masses – complete at least three multi-step calculations using relative formula masses
Paper 2 topics worth extra attention
Paper 2 covers topics 6 to 10: Rates of reaction, organic chemistry, chemical analysis, the atmosphere, and using resources. Several sub-topics have been completely quiet across both years.
A quick note before the list: The 2025 paper leaned heavily on the Haber process and compromise conditions (14 marks on Q9), reaction profiles with catalysts, atmospheric composition over geological time, polymers and condensation polymerisation, and chemical tests for chloride and carbonate ions. Those areas are much less likely to carry another major question in 2026, so they are not on our list below.
Not seen in either 2024 or 2025 (Paper 2)
| Topic | Spec ref. | What to revise |
|---|---|---|
| Cracking (thermal and catalytic) | 4.7.2.3 | Thermal and catalytic cracking, why cracking is needed (supply vs demand for hydrocarbons), products of cracking including alkenes. Crude oil and fractional distillation appeared in 2025, but cracking itself did not. |
| Carboxylic acids (reactions and properties) | 4.7.5 | Reactions of carboxylic acids with carbonates, water, and alcohols – making esters, recognising the functional group. The 2025 paper only asked candidates to name a carboxylic acid and used ethanoic acid as context in a rate question, so deeper content is still quiet. |
| Greenhouse effect mechanism | 4.9.2 | How greenhouse gases absorb and re-emit infrared radiation – the actual mechanism, not just the consequences. The 2025 paper tested how the atmosphere changed over geological time, but not the greenhouse mechanism itself. |
| Life cycle assessments (LCAs) | 4.10.2.2 | Cradle-to-grave analysis of a product – what each stage covers, limitations, and the subjectivity of LCAs. The 2025 paper had an aluminium-versus-wood evaluation that touched on LCA ideas but was not framed as a formal LCA question. |
| Phytomining and bioleaching | 4.10.1.3 | How plants and bacteria are used to extract metals from low-grade ores, and the advantages over traditional mining. |
| Sulfate ion test | 4.8.3.5 | Adding barium chloride solution then hydrochloric acid to test for sulfate ions – the expected observation is a white precipitate. Chloride and carbonate ion tests appeared in 2025, but sulfate did not. |
| Glass, ceramics, and composites | 4.10.1.5 | Properties of these materials, how their structures determine their uses, and examples of composites. |
| Effect of concentration on equilibrium | 4.6.2.5 | Le Chatelier's principle applied to concentration changes. Temperature and pressure effects were tested in 2025 as part of the Haber process question, but concentration was not. |
| Fermentation as a route to ethanol | 4.7.4 | Conditions for fermentation (yeast, sugar, warm, anaerobic) and its advantages and disadvantages. Hydration of ethene was given a single mark in 2025, but fermentation specifically was not tested. |
| Pure substances and melting point tests | 4.8.1 | Using melting point to determine purity – pure substances have sharp melting points, impure substances melt over a range. |
| Effect of surface area and concentration on rate | 4.6.1 | How changing surface area and concentration affects the rate of reaction. Explain using collision theory. The 2025 rate question focused on catalysts and temperature, so surface area and concentration are the quieter variables. |
Cracking is one of the most important organic chemistry topics and has not appeared in either year. Carboxylic acids, life cycle assessments, and the greenhouse effect mechanism are all substantial areas that could easily fill a six-mark question.
The equilibrium gap is worth noting too. The 2025 Haber process question covered temperature and pressure in depth, but concentration was left out. That makes concentration a natural candidate for 2026 if AQA decides to revisit Le Chatelier's principle.
Paper 2 final-stretch checklist
These topics should be at the top of your Paper 2 extras list.
- Cracking – explain both thermal and catalytic methods and name the products
- Carboxylic acids – write equations for reactions with carbonates and for making esters
- Greenhouse effect mechanism – describe the absorption and re-emission of IR radiation step by step
- Life cycle assessments – explain each stage and discuss limitations
- Phytomining and bioleaching – describe both processes and their advantages
- Sulfate ion test – describe the method, reagents, and expected result
- Glass, ceramics, and composites – give examples and link properties to structure
- Concentration and equilibrium – predict shifts using Le Chatelier's principle
- Fermentation – describe the conditions and compare with hydration of ethene
- Melting point and purity – sketch melting point graphs for pure and impure substances
- Surface area and concentration on rate – explain using collision theory with diagrams
Cracking, carboxylic acids, and life cycle assessments are three of the largest quiet areas on Paper 2. If you only have limited revision time, start with these.
How to use this list without panicking
Having a list of topics is only useful if you know what to do with it. Here is a simple, low-stress approach.
First, go through each topic and honestly rate your confidence from 1 to 5. Any topic you rate below a 3 goes straight to the top of your revision plan. There is no point revising what you already know well when there are clearer gaps to fill.
Second, use active revision. Do not just read your notes. For each topic, try to answer a past paper question or write out a full explanation from memory. Retrieval practice is far more effective than passive reading, and the research on this is very clear.
Third, work in short focused sessions rather than long exhausted ones. Fifteen to twenty minutes on one topic, followed by a break, is plenty. You will retain more from four focused 20-minute sessions than from one drained 80-minute session.
Finally, breathe. The fact that you are reading this article and thinking about your revision strategy already puts you ahead of most students. You have time to cover these topics properly.
What about topics that were tested recently?
Topics that were tested heavily in 2025 – atomic structure and isotopes, ionic and covalent bonding, graphite, nanoparticles, extraction of aluminium via electrolysis, alkalis and titrations, the Haber process, reaction profiles with catalysts, polymers, atmospheric composition, and flame tests – are less likely to appear as major questions in 2026. But AQA often includes one or two marks on a familiar topic as part of a broader question, so do not skip them entirely.
The specification is your contract with the exam board – anything on it is fair game. The list above simply highlights the quieter corners where a final burst of revision effort is most likely to pay off.
