AP® Chemistry, one particle at a time.
Built on the 2024 course framework, in its order: nine units, each topic taught from scratch at the particle level, with the math you need refreshed first. Then practice that checks what the exam checks: units, significant figures, particle diagrams and justifications that compare both species.
Beta This course has not yet been reviewed by an AP® Chemistry teacher.
Units and Dimensional Analysis
Skills · Math you need. Units 1 and 2 lessons and every notes page are free.
Start the first lessonMissed questions come back
Anything you miss returns when you are about to forget it, not on a fixed date.
Open review →A little every day
Questions, cards and tool steps count toward a daily goal and a streak shared across every LevlPrep subject. 15 practice questions a day are free.
Practice now →The path through the course
The units in framework order, then the math refresher: logs, exponents, scientific notation, significant figures and units, each placed just before the topic that first needs it. Tap one to open it.
- UnitsUnit 1: Atomic Structure and PropertiesStart here · 8 topics · 7–9% of exam
- Unit 2: Compound Structure and Properties7 topics · 7–9% of exam
- Unit 3: Properties of Substances and Mixtures13 topics · 18–22% of exam
- Unit 4: Chemical Reactions9 topics · 7–9% of exam
- Unit 5: Kinetics11 topics · 7–9% of exam
- Unit 6: Thermochemistry9 topics · 7–9% of exam
- Unit 7: Equilibrium12 topics · 7–9% of exam
- Unit 8: Acids and Bases11 topics · 11–15% of exam
- Unit 9: Thermodynamics and Electrochemistry11 topics · 7–9% of exam
- Math you needMath you need5 topics
What the course covers
9 units and 91 topics in the order of the 2024 course framework, plus 5 math refresher topics built on the official equations and constants sheet. Each topic has an interactive lesson, a free notes page and exam-style practice, and each unit a printable unit sheet.
1,565 practice questions, many in stimulus sets of four or five that share one table, graph or experiment, as on the real exam. Every option has its own explanation.
All 96 topics are built, each with its lesson, notes and questions.
How to use it
- Read the lesson. It checks what you need first, then walks the cause and effect one step at a time, with a picture for every process.
- Answer as you go. Anything you miss goes into your review queue and comes back when you are about to forget it.
- Train the hard parts. Justifications, particle diagrams, equilibrium and buffer drills, each checked step by step.
- Check your mastery. Your dashboard shows it by unit, topic and science practice, and every miss links to its lesson.
Three trainers for what the exam marks hardest.
Write a justification and check it against the rubric, place the ions and water molecules in a particle diagram, run unlimited equilibrium and buffer drills, then answer the questions about what you did. The particle diagrams trainer is free.
See all toolsTry a step.
One real question from the bank. Pick an answer to see why it is right or wrong.
- Read the situation
- Pick the answer you would bet on
- See the cause and effect behind it
What does one mole of a substance contain?
Show the answer
6.022 × 10²³ of the particles named, such as atoms or molecules One mole is Avogadro's number, 6.022 × 10²³, of whatever particles you name.
Practice and study
- PracticeDrill a unit, a topic or a science practice, with stimulus sets.
- ReviewMissed questions come back when you are about to forget them.
- ExamsUnit tests and full timed practice exams in the real 60 + 7 format.
- Free-response practiceLong and short free-response questions, with rubrics and sample answers.
- Justification trainerExplain and justify prompts with a rubric checklist and two model answers.
- Cram kit3-week and 2-week plans to exam day, and timed mixed sets.
- FlashcardsSpaced-repetition cards from the glossary.
- ToolsTrainers and drills, then the questions about what you did.
- DashboardMastery by unit, topic and science practice.
- GlossaryEvery term, with a plain definition and where it is taught.
- Equations sheet, explainedWhat each equation and constant is for, and what the sheet leaves out.
- Score calculatorAn estimated score from your multiple-choice and free-response results.
- Free unit practice testsA free sample test for every unit, with every option explained.
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