🧪AP Chemistry
Key Terms

362 essential vocabulary terms and definitions to know for your AP Chemistry exam

🧪AP Chemistry
Key Terms by Unit

Unit 1 – Atomic Structure & Properties

1.1 Moles and Molar Mass

1.2 Mass Spectroscopy 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

Unit 2 – Compound Structure and Properties

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 Bond Hybridization

Unit 3 – Properties of Substances and Mixtures

3.1 Intermolecular 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 Chromatography

3.10 Solubility

3.11 Spectroscopy and the Electromagnetic Spectrum

3.12 Photoelectric Effect

3.13 Beer-Lambert Law

Unit 4 – Chemical Reactions

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

Unit 5 – Kinetics

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 Steady-State Approximation

5.10 Multistep Reaction Energy Profile

5.11 Catalysis

Unit 6 – Thermochemistry

6.1 Endothermic and Exothermic Processes

6.2 Energy Diagrams of Reactions

6.3 Kinetic Energy, Heat Transfer, and Thermal Equilibrium

6.4 Heat Capacity and Calorimetry

6.5 Phase Changes and Energy

6.6 Introduction to Enthalpy of Reaction

6.7 Bond Enthalpy and Bond Dissociation Energy

6.8 Enthalpies of Formation

6.9 Hess’s Law

Unit 7 – Equilibrium

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

7.12 Common Ion Effect

Unit 8 – Acids & Bases

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 Structures of Acids and Bases

8.7 pH and pKa

8.8 Properties of Buffers

8.9 Henderson-Hasselbalch Equation

8.10 Buffer Capacity

8.11 Multiple Choice Questions

Unit 9 – Thermodynamics and Electrochemistry

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 Coupled Reactions

9.7 Galvanic (Voltaic) and Electrolytic Cells

9.8 Cell Potential and Free Energy

9.9 Cell Potential Under Nonstandard Conditions

9.10 Electrolysis and Faraday's Law

9.11 Multiple Choice Questions

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