UniGeniusAP Chemistry

AP Chemistry

AP Chemistry study planner for May 2027

Units are not worth the same. Properties of Substances and Mixtures is 18–22% of Section I and Acids and Bases 11–15%, while each other unit is 7–9%. Tell the planner how sure you are of each unit and it spends your hours where the points are.

Hours a week for AP Chemistry
Unit 1: Atomic Structure and Properties 7–9%
Unit 2: Compound Structure and Properties 7–9%
Unit 3: Properties of Substances and Mixtures 18–22%
Unit 4: Chemical Reactions 7–9%
Unit 5: Kinetics 7–9%
Unit 6: Thermochemistry 7–9%
Unit 7: Equilibrium 7–9%
Unit 8: Acids and Bases 11–15%
Unit 9: Thermodynamics and Electrochemistry 7–9%

29 weeks to the exam on May 6, 2027

Start with Unit 3

Properties of Substances and Mixtures: 24.3 of your 116 hours. It carries 18–22% of Section I, about 12 of the 60 questions.

Hours per unit
UnitHoursAbout this many questions
Unit 3: Properties of Substances and Mixtures24.312 of 60
Unit 8: Acids and Bases15.88 of 60
Unit 1: Atomic Structure and Properties9.75 of 60
Unit 2: Compound Structure and Properties9.75 of 60
Unit 4: Chemical Reactions9.75 of 60
Unit 5: Kinetics9.75 of 60
Unit 6: Thermochemistry9.75 of 60
Unit 7: Equilibrium9.75 of 60
Unit 9: Thermodynamics and Electrochemistry9.75 of 60

Week by week

  1. Week 1 · Oct 14Unit 3: Properties of Substances and Mixtures
  2. Week 2 · Oct 21Unit 3: Properties of Substances and Mixtures
  3. Week 3 · Oct 28Unit 3: Properties of Substances and Mixtures
  4. Week 4 · Nov 4Unit 3: Properties of Substances and Mixtures
  5. Week 5 · Nov 11Unit 3: Properties of Substances and Mixtures
  6. Week 6 · Nov 18Unit 3: Properties of Substances and Mixtures
  7. Week 7 · Nov 25Unit 3: Properties of Substances and Mixtures, Unit 8: Acids and Bases
  8. Week 8 · Dec 2Unit 8: Acids and Bases
  9. Week 9 · Dec 9Unit 8: Acids and Bases
  10. Week 10 · Dec 16Unit 8: Acids and Bases
  11. Week 11 · Dec 23Unit 8: Acids and Bases, Unit 1: Atomic Structure and Properties
  12. Week 12 · Dec 30Unit 1: Atomic Structure and Properties
  13. Week 13 · Jan 6Unit 1: Atomic Structure and Properties, Unit 2: Compound Structure and Properties
  14. Week 14 · Jan 13Unit 2: Compound Structure and Properties
  15. Week 15 · Jan 20Unit 2: Compound Structure and Properties, Unit 4: Chemical Reactions
  16. Week 16 · Jan 27Unit 4: Chemical Reactions
  17. Week 17 · Feb 3Unit 4: Chemical Reactions
  18. Week 18 · Feb 10Unit 4: Chemical Reactions, Unit 5: Kinetics
  19. Week 19 · Feb 17Unit 5: Kinetics
  20. Week 20 · Feb 24Unit 5: Kinetics, Unit 6: Thermochemistry
  21. Week 21 · Mar 3Unit 6: Thermochemistry
  22. Week 22 · Mar 10Unit 6: Thermochemistry
  23. Week 23 · Mar 17Unit 6: Thermochemistry, Unit 7: Equilibrium
  24. Week 24 · Mar 24Unit 7: Equilibrium
  25. Week 25 · Mar 31Unit 7: Equilibrium, Unit 9: Thermodynamics and Electrochemistry
  26. Week 26 · Apr 7Unit 9: Thermodynamics and Electrochemistry
  27. Week 27 · Apr 14Unit 9: Thermodynamics and Electrochemistry
  28. Week 28 · Apr 21Timed practice exam, then review every miss
  29. Week 29 · Apr 28Timed practice exam, then review every miss

Check your units with the free test

ExamThursday, May 6, 2027
Heaviest unitUnit 3, Properties of Substances and Mixtures: 18–22%
Next heaviestUnit 8, Acids and Bases: 11–15%
Last weeksKept for timed practice exams

How the plan is made

  • Each unit starts from the middle of its published Section I weight range.
  • A unit you have not started gets about one and a half times its share; a solid unit gets under half.
  • Units are ordered heaviest need first, and the final one or two weeks are timed practice exams with review of every miss.

Making the hours count

  • Start each unit with a few questions to find what you do not know, then the lesson, then more questions.
  • Practice free-response answers every week: they are half the score.
  • Keep a short calculation drill in every week, so stoichiometry, equilibrium and pH stay quick.
  • Redo the plan when a unit moves from shaky to solid.

Try 2 questions

Question 1
Which box best represents the solute particles in an aqueous solution of K₂SO₄? Water molecules are not shown.
Question 2
A solution at 25 °C has [OH⁻] = 3.2 × 10⁻⁴ M. What is its pH?

Next step

Take the free diagnosticTake the course tour

College Board's AP Chemistry course page, with the unit weights

Questions people ask

Which AP Chemistry unit is weighted most?

Unit 3, Properties of Substances and Mixtures, at 18–22% of the multiple-choice section, then Unit 8, Acids and Bases, at 11–15%. Each other unit is 7–9%.

How long should I study for AP Chemistry?

It depends on how much of the course you know. The planner turns your weekly hours into hours per unit; most students do best with steady weekly practice rather than a final cram.

When should I start studying for the 2027 AP Chemistry exam?

Now is best: steady weekly study through the school year leaves the final weeks for full practice exams before May 6, 2027.