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⚗️ Free AP Chemistry Study Guide

AP Chemistry · All 9 Units

Master AP Chemistry from atomic structure through applications of thermodynamics. Flashcards, cheat sheets, essential terms, practice questions, and visual reviews for all 9 units — all completely free.

9 units covered
180+ practice questions
180+ flashcards
College Board aligned
100% free

Choose your unit

Each unit has 8 study resources — flashcards, cheat sheet, essential terms, podcast, practice questions, visual review, and SAQ practice.

⚛️
Unit 1
The Building Blocks
Atomic Structure & Properties
Moles, mass spectrometry, electron configuration, photoelectron spectroscopy, and periodic trends.
📊 7–9% of exam
Start Unit 1 →
🔗
Unit 2
How Atoms Combine
Molecular & Ionic Compound Structure & Properties
Ionic and covalent bonding, Lewis structures, VSEPR geometry, and bonding models.
📊 7–9% of exam
Start Unit 2 →
💧
Unit 3
The Biggest Unit
Intermolecular Forces & Properties
London dispersion, dipole-dipole, hydrogen bonding, solutions, and states of matter — the highest-weighted unit on the exam.
📊 18–22% of exam
Start Unit 3 →
🧪
Unit 4
Matter in Motion
Chemical Reactions
Physical and chemical changes, balancing equations, stoichiometry, and types of chemical reactions.
📊 7–9% of exam
Start Unit 4 →
⏱️
Unit 5
How Fast?
Kinetics
Reaction rates, rate laws, collision theory, reaction mechanisms, and catalysts.
📊 7–9% of exam
Start Unit 5 →
🔥
Unit 6
Energy & Change
Thermodynamics
Endothermic vs. exothermic processes, enthalpy, bond energies, and calorimetry.
📊 7–9% of exam
Start Unit 6 →
⚖️
Unit 7
Balance Point
Equilibrium
The equilibrium constant, Le Châtelier's principle, and solubility equilibria.
📊 7–9% of exam
Start Unit 7 →
🧫
Unit 8
Proton Transfer
Acids & Bases
pH and pOH, acid-base equilibria, titrations, and buffers — the second-most-weighted unit.
📊 11–15% of exam
Start Unit 8 →
🔋
Unit 9
Putting It Together
Applications of Thermodynamics
Entropy, Gibbs free energy, electrochemistry, and galvanic and electrolytic cells.
📊 7–9% of exam
Start Unit 9 →

About AP Chemistry

AP Chemistry is a college-level introductory chemistry course that explores matter from the atomic level up through complex chemical systems. The course builds from the structure of atoms and the bonds that connect them, through how molecules interact and react, to the rates and energetics of reactions, and finally to the balance points and proton-transfer reactions that govern acids, bases, and electrochemical systems.

This page covers all 9 units — Atomic Structure & Properties, Molecular & Ionic Compound Structure & Properties, Intermolecular Forces & Properties, Chemical Reactions, Kinetics, Thermodynamics, Equilibrium, Acids & Bases, and Applications of Thermodynamics.

Every page on this site is aligned to the College Board's official AP Chemistry Course and Exam Description and completely free. Use what works for your study style — flashcards for active recall, the cheat sheet for a one-page overview, or practice questions to test yourself before the exam.

What's included in each unit

Every unit has the same study resources, designed for different learning styles.

🗂
Flashcards
Interactive cards per unit
🗺
Cheat Sheet
One-page visual summary
Essentials
Key terms and big ideas
🎙
Podcast
Audio review on the go
🎨
Visual Review
Slide-by-slide walkthrough
📝
Practice MCQ
Exam-style questions
✍️
SAQ Practice
Short-answer practice

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