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A-Level Chemistry 9701 Paper 2: Equations, States and Significant Figures
Chemistry: equation first
This paper is AS structured chemistry: bonding, stoichiometry, equilibria, organic routes and practical design. Marks sit in the equation and its state symbols – unbalanced, unlabelled or rounded wrongly, and a correct idea still loses marks.
How is A-Level Chemistry 9701 Paper 2 assessed, and what does each part carry?
Paper 2 (AS structured questions): Structured questions, 60 marks (AS 46% / A Level 23%); Paper 1 (AS multiple choice): 40 multiple-choice questions, 40 marks (AS 31% / A Level 15.5%); Paper 3 (AS practical skills): Practical work and structured questions, 40 marks (AS 23% / A Level 11.5%); Paper 4/5 (A2 level): A2 structured 100 + planning 30 (A Level 38.5% / 11.5%)
Assessment at a glance (2027)
| Component | Content | Weighting | Duration |
|---|---|---|---|
| Paper 2 (AS structured questions) | Structured questions, 60 marks | AS 46% / A Level 23% | 1 h 15 min |
| Paper 1 (AS multiple choice) | 40 multiple-choice questions, 40 marks | AS 31% / A Level 15.5% | 1 h 15 min |
| Paper 3 (AS practical skills) | Practical work and structured questions, 40 marks | AS 23% / A Level 11.5% | 2 h |
| Paper 4/5 (A2 level) | A2 structured 100 + planning 30 | A Level 38.5% / 11.5% | 2 h / 1 h 15 min |
Eight questions for 60 marks in 1 h 15 min is about 8 minutes each. For calculations write the equation and formula first (n = m/M, c = n/V, q = mcT, Kc), then substitute, then give the unit; for explanations give the cause and then the consequence.
What each paper is actually testing
| Paper | Drill focus | How marks are lost |
|---|---|---|
| Paper 2 (AS structured questions) | equation and formula first, then numbers | The equation is unbalanced or the state symbols are missing; concept and equation marks are separate, so one or two go every time. |
| Paper 1 (AS multiple choice) | speed paper, sweep every question once | The multiple-choice paper is answered from memorised definitions, so trend comparisons and mole calculations are guessed between the last two options. |
| Paper 3 (AS practical skills) | readings, sig figs, uncertainty | The practical paper records results with no precision and no safety point; operation and recording marks are separate, so several go each time. |
| Paper 4/5 (A2 level) | solid AS base first | Significant figures do not match the data given, or the unit is dropped, so a correct value is still penalised. |
What is each A-Level Chemistry 9701 Paper 2 paper really testing, and what should you drill?
Paper 2 (AS structured questions): equation and formula first, then numbers; Paper 1 (AS multiple choice): speed paper, sweep every question once; Paper 3 (AS practical skills): readings, sig figs, uncertainty; Paper 4/5 (A2 level): solid AS base first
Drill order: by topic, then by year, then the mark scheme
| Step | What you do | Why |
|---|---|---|
| 1. By topic | Work through each topic, starting with the paper that allows least help (no calculator / closed book) | Exposes what is genuinely not understood |
| 2. By year | Whole papers to time, one or two a week | Trains pace, stamina and question selection |
| 3. Mark scheme | Go through the marking scheme question by question and log the scoring steps you missed | Most lost marks are written wrong, not thought wrong |
Should drilling go by topic first or by year?
By topic first, then whole papers by year, then the mark scheme. The first third of the time goes topic by topic (8-10 years of the same topic back to back), the middle switches to timed whole papers, and the last fortnight only redoes the recurring errors from your log.
A 12-week drilling timetable
| Week | Phase | What to do |
|---|---|---|
| Weeks 1-3 | By topic: foundation | Topic by topic, starting with the easiest marks, building habits and recall |
| Weeks 4-6 | By topic: core | 8-10 years of the same topic back to back, errors classified by topic |
| Weeks 7-8 | By topic: advanced and electives | Elective and higher-order topics, now under time pressure |
| Weeks 9-10 | By year: timed papers | One full paper a week, timed, no reference materials |
| Week 11 | Mark scheme work | Question by question against the marking scheme; list the scoring steps you omitted |
| Week 12 | Plug holes and simulate | Only the recurring errors from your log, then one full exam simulation |
Subject-specific weighting for this timetable: Weeks 1-3: equations and stoichiometry. Balance and label states first, then moles, then numbers.
Weeks 4-6: bonding and structure. Draw the arrangement, then explain properties with reference to a named bond or force.
Weeks 7-9: equilibria and organic routes. Conditions and reagents before products, and label every step on the route map.
Weeks 10-12: full papers to time, calculations first; redo only the questions where states or significant figures went wrong.
Use it properly: this is not a checklist to finish. Every week must keep time for redoing errors, or from week 9 you will be repeating the same batch.
Pacing
| Paper | Time | Suggested split |
|---|---|---|
| Paper 2 (AS structured questions) | 1 h 15 min | about 8 min a question, 8 to check |
| Paper 1 (AS multiple choice) | 1 h 15 min | about 1.9 min a question |
| Paper 3 (AS practical skills) | 2 h | about 30 min a part |
| Paper 4/5 (A2 level) | 2 h / 1 h 15 min | A2 route only |
How should the time be split inside each A-Level Chemistry 9701 Paper 2 paper?
Paper 2 (AS structured questions): about 8 min a question, 8 to check; Paper 1 (AS multiple choice): about 1.9 min a question; Paper 3 (AS practical skills): about 30 min a part; Paper 4/5 (A2 level): A2 route only
The drilling mistakes that cost the most marks
| Mistake | What it looks like | What actually happens | Instead |
|---|---|---|---|
| Missing units | The number only | Loses every value mark | Add mol, dm^3, mol/dm^3 |
| cm^3 not converted | 25.0 multiplied by 0.100 directly | Concentration out by 1000x | 25.0 cm^3 = 0.0250 dm^3 |
| Wrong molar volume | 22.4 dm^3 used at r.t.p. | Gas volume all wrong | Use 24 dm^3/mol at room temperature |
| Bond energy not scaled | Subtracting 432 only once | Wrong sign and value | 2 mol HCl formed, so multiply by 2 |
| Conclusion only | ‘Because it is more reactive’ | Half marks at best | Give the cause (ionisation energy falls), then the effect |
The error log and the mark scheme
Three columns: the equation or answer as written, the scheme key words (balanced, state symbols, moles, significant figures, conditions), and which was missing. Put the most frequent gap on page one.
How many years should you drill?
Syllabus content and paper structure have changed, so older organic routes and practical questions do not always match the current paper: build the answer order on three to five years of current papers, then use the official specimen and textbook exercises.
How many years of past papers is enough?
Syllabus content and paper structure have changed, so older organic routes and practical questions do not always match the current paper: build the answer order on three to five years of current papers, then use the official specimen and textbook exercises.
Frequently asked questions
Is this page a mock paper or a drilling guide?
This is the A-Level Chemistry 9701 Paper 2 drilling guide: assessment structure, drill order, a 12-week timetable, pacing, common mark losses and the error-log method. For questions with answers, use the A-Level Chemistry 9701 Paper 2 mock papers linked under Related.
By topic or by year first?
By topic. Eight to ten years of the same topic back to back is what exposes repeating errors; going straight to whole papers just repeats the same batch under time pressure.
How should the error log be written?
Do not copy out questions. Per error record four things: question reference, which step failed (concept, wording, calculation), what the mark scheme requires, and the correct action next time.
Do missing state symbols really lose marks?
Yes: the scheme scores the equation and the states separately. Write the four brackets immediately after the equation, then re-check the balance.
Do organic routes need the conditions?
Yes: reagents and conditions score separately from the product, so the product alone is half. Label each step on the map instead of writing a paragraph.
Official references
| Resource | What to use it for |
|---|---|
| Cambridge A-Level Chemistry 9701 programme page | Confirm the marks, times and weightings of Papers 1-5 |
| https://www.tutorzone.com.hk/en-alevel-chemistry-9701-paper-4-mock-2027/ | A-Level Chemistry Paper 4 (A2 structured) drilling mock |
Related: practice area · A-Level Chemistry Paper 4 drilling mock · A-Level Chemistry 9701 drilling guide
Next step: find a tutor / register as a tutor
After drilling, the hard part is telling a conceptual error from a writing error. Tell us the year group, the school and your available times, and TutorZone will match you with a tutor who knows the HKEAA assessment requirements.
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