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AP Chemistry Practice Examination

AP Chemistry Practice Examination

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AP Chemistry Mock Exam – Overview

The AP Chemistry Mock Exam is designed to mirror the structure and rigor of the official AP® Chemistry assessment, helping students build confidence and mastery across all major units. It covers fundamental concepts such as atomic structure, periodic trends, bonding, molecular properties, and thermodynamics, while also testing advanced applications in chemical reactions, kinetics, equilibrium, acids and bases, and electrochemistry.

Students will engage with a wide range of question types—including calculation-based, conceptual, and data-interpretation problems—across all nine units. Each unit emphasizes both foundational knowledge and applied problem-solving skills, from interpreting mass spectra and photoelectron spectroscopy to analyzing reaction mechanisms, titration curves, and thermodynamic favorability.

With hundreds of practice questions organized by topic, this mock exam provides a comprehensive review of the AP Chemistry curriculum, ensuring students are well-prepared to demonstrate critical thinking, analytical reasoning, and scientific inquiry on test day.

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AP Chemistry Practice Examination – Units and Sub-Units

 

Unit 1 | Atomic Structure and Properties

The atom is the fundamental unit of all matter. Learn to use moles, interpret the periodic table, and examine spectra to understand pure substances and mixtures.

  • 1.1 | Moles and Molar Mass – 20 questions
  • 1.2 | Mass Spectra of Elements – 20 questions
  • 1.3 | Elemental Composition of Pure Substances – 20 questions
  • 1.4 | Composition of Mixtures – 20 questions
  • 1.5 | Atomic Structure and Electron Configuration – 20 questions
  • 1.6 | Photoelectron Spectroscopy – 20 questions
  • 1.7 | Periodic Trends – 50 questions
  • 1.8 | Valence Electrons and Ionic Compounds – 20 questions

 

Unit 2 | Compound Structure and Properties

Explore ionic, covalent, and metallic bonding, Lewis structures, resonance, and VSEPR theory.

  • 2.1 | Types of Chemical Bonds – 20 questions
  • 2.2 | Intramolecular Force and Potential Energy – 20 questions
  • 2.3 | Structure of Ionic Solids – 20 questions
  • 2.4 | Structure of Metals and Alloys – 20 questions
  • 2.5 | Lewis Diagrams – 20 questions
  • 2.6 | Resonance and Formal Charge – 20 questions
  • 2.7 | VSEPR and Hybridization – 20 questions

 

Unit 3 | Properties of Substances and Mixtures

Understand phases of matter, gas laws, solutions, mixtures, and spectroscopy.

  • 3.1 | Intermolecular and Interparticle Forces – 50 questions
  • 3.2 | Properties of Solids – 50 questions
  • 3.3 | Solids, Liquids, and Gases – 20 questions
  • 3.4 | Ideal Gas Law – 20 questions
  • 3.5 | Kinetic Molecular Theory – 20 questions
  • 3.6 | Deviation from Ideal Gas Law – 20 questions
  • 3.7 | Solutions and Mixtures – 20 questions
  • 3.8 | Representations of Solutions – 20 questions
  • 3.9 | Separation of Solutions and Mixtures – 20 questions
  • 3.10 | Solubility – 20 questions
  • 3.11 | Spectroscopy and Electromagnetic Spectrum – 20 questions
  • 3.12 | Properties of Photons – 20 questions
  • 3.13 | Beer-Lambert Law – 20 questions

 

Unit 4 | Chemical Reactions

Explore chemical changes, reaction types, stoichiometry, titrations, and redox reactions.

  • 4.1 | Introduction for Reactions – 20 questions
  • 4.2 | Net Ionic Equations – 20 questions
  • 4.3 | Representations of Reactions – 20 questions
  • 4.4 | Physical and Chemical Changes – 20 questions
  • 4.5 | Stoichiometry – 60 questions
  • 4.6 | Introduction to Titration – 20 questions
  • 4.7 | Types of Chemical Reactions – 40 questions
  • 4.8 | Introduction to Acid-Base Reactions – 20 questions
  • 4.9 | Oxidation-Reduction (Redox) Reactions – 20 questions

 

Unit 5 | Kinetics

Examine reaction rates, rate laws, mechanisms, and catalysis.

  • 5.1 | Reaction Rates – 20 questions
  • 5.2 | Introduction to Rate Law – 40 questions
  • 5.3 | Concentration Changes Over Time – 40 questions
  • 5.4 | Elementary Reactions – 12 questions
  • 5.5 | Collision Model – 20 questions
  • 5.6 | Reaction Energy Profile – 20 questions
  • 5.7 | Introduction to Reaction Mechanisms – 20 questions
  • 5.8 | Reaction Mechanism and Rate Law – 20 questions
  • 5.9 | Pre-Equilibrium Approximation – 20 questions
  • 5.10 | Multistep Reaction Energy Profile – 20 questions
  • 5.11 | Catalysis – 20 questions

 

Unit 6 | Thermochemistry

Study energy transfer, enthalpy, calorimetry, bond energies, and Hess’s Law.

  • 6.1 | Endothermic and Exothermic Processes – 40 questions
  • 6.2 | Energy Diagrams – 20 questions
  • 6.3 | Heat Transfer and Thermal Equilibrium – 20 questions
  • 6.4 | Heat Capacity and Calorimetry – 50 questions
  • 6.5 | Energy of Phase Changes – 20 questions
  • 6.6 | Introduction to Enthalpy of Reaction – 20 questions
  • 6.7 | Bond Enthalpies – 20 questions
  • 6.8 | Enthalpy of Formation – 20 questions
  • 6.9 | Hess’s Law – 20 questions

 

Unit 7 | Equilibrium

Analyze dynamic equilibrium, constants, Le Châtelier’s principle, and solubility equilibria.

  • 7.1 | Introduction to Equilibrium – 20 questions
  • 7.2 | Direction of Reversible Reactions – 20 questions
  • 7.3 | Reaction Quotient and Equilibrium Constant – 40 questions
  • 7.4 | Calculating the Equilibrium Constant – 20 questions
  • 7.5 | Magnitude of the Equilibrium Constant – 20 questions
  • 7.6 | Properties of the Equilibrium Constant – 20 questions
  • 7.7 | Calculating Equilibrium Concentrations – 20 questions
  • 7.8 | Representations of Equilibrium – 20 questions
  • 7.9 | Introduction to Le Châtelier’s Principle – 40 questions
  • 7.10 | Reaction Quotient and Le Châtelier’s Principle – 20 questions
  • 7.11 | Introduction to Solubility Equilibria – 40 questions
  • 7.12 | Common-Ion Effect – 20 questions

 

Unit 8 | Acids and Bases

Understand pH, pOH, buffers, titrations, acid/base equilibria, and molecular structures.

  • 8.1 | Introduction to Acids and Bases – 20 questions
  • 8.2 | pH and pOH of Strong Acids and Bases – 20 questions
  • 8.3 | Weak Acid and Base Equilibria – 40 questions
  • 8.4 | Acid-Base Reactions and Buffers – 20 questions
  • 8.5 | Acid-Base Titrations – 40 questions
  • 8.6 | Molecular Structure of Acids and Bases – 20 questions
  • 8.7 | pH and pKa – 20 questions
  • 8.8 | Properties of Buffers – 20 questions
  • 8.9 | Henderson-Hasselbalch Equation – 20 questions
  • 8.10 | Buffer Capacity – 20 questions
  • 8.11 | pH and Solubility – 20 questions

 

Unit 9 | Thermodynamics and Electrochemistry

Predict spontaneity, calculate free energy, and explore electrochemical cells.

  • 9.1 | Introduction to Entropy – 20 questions
  • 9.2 | Absolute Entropy and Entropy Change – 20 questions
  • 9.3 | Gibbs Free Energy and Thermodynamic Favorability – 20 questions
  • 9.4 | Thermodynamic and Kinetic Control – 20 questions
  • 9.5 | Free Energy and Equilibrium – 20 questions
  • 9.6 | Free Energy of Dissolution – 20 questions
  • 9.7 | Coupled Reactions – 20 questions
  • 9.8 | Galvanic (Voltaic) and Electrolytic Cells – 20 questions
  • 9.9 | Cell Potential and Free Energy – 20 questions
  • 9.10 | Cell Potential Under Nonstandard Conditions – 20 questions
  • 9.11 | Electrolysis and Faraday’s Law – 20 questions

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