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AP Chemistry Drilling Guide: Section I and II Order, Pacing and a 12-Week Plan
TUTORZONE EXAM DRILL GUIDE · AP CHEMISTRY (SECTIONS I AND II)
Built on the College Board AP Chemistry exam: Section I is 60 multiple-choice questions in 1 h 30 (50%); Section II is 7 free-response questions (3 long at 10 points and 4 short at 4 points) in 1 h 45 (50%). Method only: what each section tests, drill order, a 12-week timetable, pacing, the usual mark losses and the error log. For questions with answers, use the mock papers linked below.
How is AP Chemistry assessed, and what does each part carry?
Section II (Free Response): 7 questions: 3 long (10 pts) + 4 short (4 pts) (50%); Section I (Multiple Choice): 60 questions, discrete or question sets (50%)
Assessment at a glance (2027)
| Component | Content | Weighting | Duration |
|---|---|---|---|
| Section II (Free Response) | 7 questions: 3 long (10 pts) + 4 short (4 pts) | 50% | 1 h 45 min |
| Section I (Multiple Choice) | 60 questions, discrete or question sets | 50% | 1 h 30 min |
In Section II state the formula or law, then substitute, then give the answer with its unit, and explain the principle (e.g. the sign of ΔG for spontaneity).
What each paper is actually testing
| Paper | Drill focus | How marks are lost |
|---|---|---|
| Section II (Free Response) | state the formula or law first | Free-response answers substitute numbers before stating the law; explanation items give only the conclusion (for example “spontaneous”) without the sign of delta G, and titration volumes are entered in mixed units |
| Section I (Multiple Choice) | eliminate clearly wrong options | Multiple choice runs over time on calculations, averaging more than 1.5 minutes a question, instead of clearing conceptual items by elimination first; significant figures and units fail on the final line |
What is each AP Chemistry paper really testing, and what should you drill?
Section II (Free Response): state the formula or law first; Section I (Multiple Choice): eliminate clearly wrong options
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: Move unit by unit for the first nine weeks rather than timing whole papers from day one: weeks 1-4 cover Units 1-4 (atomic structure, compound structure, intermolecular forces, chemical reactions) with 30 multiple-choice items and two short free-response questions a week, drilling mole calculations and net ionic equations until they are automatic. Weeks 5-7 take Units 5-7 (kinetics, thermodynamics, equilibrium) with one long free-response question a week; weeks 8-9 take Units 8-9 (acids and bases, applications of thermodynamics), with titration and buffer calculations written without the formula sheet. Weeks 10-11 are timed whole papers in the real order (Section II first, then Section I), and the last week only redoes the recurring errors in your log.
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 |
|---|---|---|
| Section II (Free Response) | 1 h 45 min | about 20 min long, 8 min short |
| Section I (Multiple Choice) | 1 h 30 min | about 1.5 min per question |
How should the time be split inside each AP Chemistry paper?
Section II (Free Response): about 20 min long, 8 min short; Section I (Multiple Choice): about 1.5 min per question
The drilling mistakes that cost the most marks
| Mistake | What it looks like | What actually happens | Instead |
|---|---|---|---|
| Wrong pH sign | pH = log[H+] | pH is the negative logarithm | pH = -log10[H+] |
| ΔG sign error | ΔG>0 as spontaneous | Only ΔG<0 is spontaneous | ΔG<0 spontaneous, ΔG>0 non-spontaneous |
| Titration units | Unmatched V units | c1V1 = c2V2 needs same units | Use the same volume unit on both sides |
The error log and the mark scheme
Three columns and never copy out the question: law (is the relation or principle on the first line), units and significant figures (conversions, moles, concentration units), explanation (is there a reason rather than only a conclusion). Three entries in one column in a week means that column gets next week: law trouble means writing the equation before any substitution, unit trouble means a dedicated unit line, and explanation trouble means copying the official scoring guideline wording once and rewriting it in your own words.
How many years should you drill?
The AP Chemistry format is stable (60 multiple-choice plus 7 free-response, 50% each), so the official free-response sets from the last five to eight years can all be drilled whole. The thing to watch is not the year but the unit numbering: the current course description organises the content into Units 1-9, so older questions have to be relabelled to the current unit before use, otherwise a unit looks untested. Use the last five years as the backbone and mine older years for one unit at a time.
How many years of past papers is enough?
The AP Chemistry format is stable (60 multiple-choice plus 7 free-response, 50% each), so the official free-response sets from the last five to eight years can all be drilled whole. The thing to watch is not the year but the unit numbering: the current course description organises the content into Units 1-9, so older questions have to be relabelled to the current unit before use, otherwise a unit looks untested. Use the last five years as the backbone and mine older years for one unit at a time.
Frequently asked questions
Is this page a mock paper or a drilling guide?
This is the AP Chemistry 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 AP Chemistry 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.
Should Section II start with the long or the short questions?
Short ones first: four 4-point questions at about 8 minutes each bank marks quickly, leaving 60 minutes for the three 10-point long answers at about 20 minutes each, with the last five minutes for units and significant figures.
Can I drill without a calculator?
Not sensibly. The arithmetic load is heavy, so practise with the calculator you will use in the exam and get the log and exponential keystrokes automatic – timing only means something with the real tool in hand.
Official references
| Resource | What to use it for |
|---|---|
| College Board AP Chemistry exam page | Confirm the format and question counts |
| https://www.tutorzone.com.hk/en-ap-physics-1-mock-2027/ | AP Physics 1 mock |
Related: AP Chemistry original mock (Sections I and II, with answers) · AP Biology mock · practice area
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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