AP Physics 1
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Study chemistry through clear explanations, labeled particle models, worked examples and original practice. Units 1–9 cover atomic structure, bonding, substance properties, chemical reactions, kinetics, thermochemistry, equilibrium, acids and bases, and thermodynamics and electrochemistry.
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Your AP Chemistry learning path
AP CHEMISTRY · STUDY GUIDE
Your learning,
organized.
Choose a unit, expand an official topic, and open a focused lesson. Units 1–9 are available as review editions. All nine units now have focused lessons; independent review remains pending.
9 units204 focused lessonsLearn · Explore · Practice · Review
Review edition · Teacher review pending
Review edition · Teacher review pending
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01 Atomic Structure and Properties 22 lessons · Review edition
Connect measurable masses to particle counts. Interpret isotope and photoelectron spectra, build electron configurations, and explain periodic trends and common ion formulas. 44 original questions, 66 recall cards and 22 written challenges follow Learn → Explore → Practice → Review. Independent teacher review and student testing remain pending.
1.1 Moles and Molar Mass
1.2 Mass Spectra of Elements
1.3 Elemental Composition of Pure Substances
1.4 Composition of Mixtures
1.5 Atomic Structure and Electron Configuration
1.6 Photoelectron Spectroscopy
1.7 Periodic Trends
1.8 Valence Electrons and Ionic Compounds
02 Compound Structure and Properties 20 lessons · Review edition
Build explanations of bonding, Lewis structures, resonance and molecular shape. 40 original questions, 60 recall cards and 20 written challenges follow Learn → Explore → Practice → Review. Optional rotatable models reveal geometry and lattice structure; complete 2D explanations remain available. Independent teacher review and student testing remain pending.
2.1 Types of Chemical Bonds
2.2 Intramolecular Force and Potential Energy
2.3 Structure of Ionic Solids
2.4 Structure of Metals and Alloys
2.5 Lewis Diagrams
2.6 Resonance and Formal Charge
2.7 VSEPR and Hybridization
03 Properties of Substances and Mixtures 24 lessons · Review edition
Explain intermolecular forces, solids and gases; represent solutions and separation methods; connect photons and absorbance to measurements. 48 original questions, 72 recall cards and 24 written challenges follow Learn → Explore → Practice → Review. Optional rotatable particle models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
3.1 Intermolecular and Interparticle Forces
3.2 Properties of Solids
3.3 Solids, Liquids, and Gases
3.4 Ideal Gas Law
3.5 Kinetic Molecular Theory
3.6 Deviation from Ideal Gas Law
3.7 Solutions and Mixtures
3.8 Representations of Solutions
3.9 Separation of Solutions and Mixtures
3.10 Solubility
3.11 Spectroscopy and the Electromagnetic Spectrum
3.12 Properties of Photons
04 Chemical Reactions 22 lessons · Review edition
Track chemical change through balanced equations, particle inventories, stoichiometry, titration, proton transfer and redox. 44 original questions, 66 recall cards and 22 written challenges follow Learn → Explore → Practice → Review. Optional rotatable reaction inventories supplement complete 2D explanations. Independent teacher review and student testing remain pending.
4.1 Introduction for Reactions
4.2 Net Ionic Equations
4.3 Representations of Reactions
4.4 Physical and Chemical Changes
4.5 Stoichiometry
4.6 Introduction to Titration
4.7 Types of Chemical Reactions
4.8 Introduction to Acid-Base Reactions
4.9 Oxidation-Reduction (Redox) Reactions
05 Kinetics 22 lessons · Review edition
Measure reaction rates, infer rate laws, interpret concentration–time data, and connect collisions, mechanisms and catalysts. 44 original questions, 66 recall cards and 22 written challenges follow Learn → Explore → Practice → Review. Optional 3D surface and orientation models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
5.1 Reaction Rates
5.2 Introduction to Rate Law
5.3 Concentration Changes Over Time
5.4 Elementary Reactions
5.5 Collision Model
5.6 Reaction Energy Profile
5.7 Introduction to Reaction Mechanisms
5.8 Reaction Mechanism and Rate Law
5.9 Pre-Equilibrium Approximation
5.10 Multistep Reaction Energy Profile
06 Thermochemistry 22 lessons · Review edition
Track energy between system and surroundings, interpret heating curves, calculate calorimetry and reaction heats, and connect bond inventories, formation data and Hess’s law. 44 original questions, 66 recall cards and 22 written challenges follow Learn → Explore → Practice → Review. Optional 3D intact-water and molecular bond-inventory models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
6.1 Endothermic and Exothermic Processes
6.2 Energy Diagrams
6.3 Heat Transfer and Thermal Equilibrium
6.4 Heat Capacity and Calorimetry
6.5 Energy of Phase Changes
6.6 Introduction to Enthalpy of Reaction
6.7 Bond Enthalpies
6.8 Enthalpy of Formation
07 Equilibrium 24 lessons · Review edition
Explain dynamic equilibrium, connect particle inventories to Q and K, solve equilibrium compositions, and predict responses to concentration, pressure, temperature and common ions. 48 original questions, 72 recall cards and 24 written challenges follow Learn → Explore → Practice → Review. Optional 3D dissociation and crystal/solution inventory models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
7.1 Introduction to Equilibrium
7.2 Direction of Reversible Reactions
7.3 Reaction Quotient and Equilibrium Constant
7.4 Calculating the Equilibrium Constant
7.5 Magnitude of the Equilibrium Constant
7.6 Properties of the Equilibrium Constant
7.7 Calculating Equilibrium Concentrations
7.8 Representations of Equilibrium
7.9 Introduction to Le Châtelier’s Principle
7.10 Reaction Quotient and Le Châtelier’s Principle
7.11 Introduction to Solubility Equilibria
08 Acids and Bases 24 lessons · Review edition
Connect proton transfer, pH, weak equilibria, titration curves, molecular structure, buffers and pH-dependent solubility. 48 original questions, 72 recall cards and 24 written challenges follow Learn → Explore → Practice → Review. Optional 3D proton-transfer and molecular-shape models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
8.1 Introduction to Acids and Bases
8.2 pH and pOH of Strong Acids and Bases
8.3 Weak Acid and Base Equilibria
8.4 Acid-Base Reactions and Buffers
8.5 Acid-Base Titrations
8.6 Molecular Structure of Acids and Bases
8.8 Properties of Buffers
8.9 Henderson-Hasselbalch Equation
8.10 Buffer Capacity
8.11 pH and Solubility
09 Thermodynamics and Electrochemistry 24 lessons · Review edition
Connect entropy, free energy, equilibrium, dissolution, coupled reactions, electrochemical cells and quantitative electrolysis. 48 original questions, 72 recall cards and 24 written challenges follow Learn → Explore → Practice → Review. Optional 3D particle-dispersal and hydration models supplement complete 2D explanations. Independent teacher review and student testing remain pending.
9.1 Introduction to Entropy
9.2 Absolute Entropy and Entropy Change
9.3 Gibbs Free Energy and Thermodynamic Favorability
9.4 Thermodynamic and Kinetic Control
9.5 Free Energy and Equilibrium
9.6 Free Energy of Dissolution
9.7 Coupled Reactions
9.8 Galvanic (Voltaic) and Electrolytic Cells
9.9 Cell Potential and Free Energy
9.10 Cell Potential Under Nonstandard Conditions
Official College Board framework. Lesson titles, diagrams and questions are original Refresh Kid teaching materials. Review edition; independent teacher review and student usability testing remain pending.
Curriculum sources & scope · AP Chemistry
College Board
CED effective Fall 2024 plus publisher corrections.
Complete official content is in the CED unit guides, including topic IDs, learning objectives, essential knowledge and course skills. The outline on this page is navigation only.
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What sessions can focus on
01 Atomic structure, bonding, and intermolecular forces
02 Chemical reactions and stoichiometry
03 Kinetics, equilibrium, and acids and bases
04 Thermodynamics and electrochemistry
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