AP® Chemistry Practice Test

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Unit 1: Atomic Structure and Properties (150) 40
  • Moles and molar mass 20 2
  • Mass spectroscopy of elements 20 1
  • Elemental composition of pure substances 20 6
  • Composition of mixtures 20 2
  • Atomic structure and electron configuration 20 13
  • Photoelectron spectroscopy 10 1
  • Periodic trends 20 11
  • Valence electrons and ionic compounds 20 4
Unit 2: Molecular and Ionic Compound Structure and Properties (100) 23
  • Types of chemical bonds 20 11
  • Intramolecular force and potential energy 20 0
  • Structure of ionic solids 20 0
  • Structure of metals and alloys 10 1
  • Lewis diagrams 10 3
  • Resonance and formal charge 10 2
  • VSEPR and bond hybridization 10 6
Unit 3: Intermolecular Forces and Properties (110) 53
  • Intermolecular forces 20 18
  • Solids liquids and gases 20 10
  • Kinetic molecular theory 20 7
  • Solutions and mixtures 20 18
  • Photoelectric effect 30 0
Unit 4: Chemical Reactions (110) 28
  • Introduction for reactions 20 0
  • Net ionic equations 20 2
  • Representations of reactions 20 4
  • Physical and chemical changes 20 0
  • Stoichiometry 20 13
  • Types of chemical reactions 10 9
Unit 5: Kinetics (110) 19
  • Reaction rate 20 6
  • Introduction to rate law 20 5
  • Elementary reactions 20 1
  • Collision model 20 0
  • Introduction to reaction mechanisms 10 2
  • Multistep reaction energy profile 10 0
  • Catalysis 10 5
Unit 6: Thermodynamics (70) 25
  • Endothermic and exothermic processes 10 3
  • Heat transfer and thermal equilibrium 10 4
  • Heat capacity and calorimetry 10 7
  • Energy of phase changes 10 3
  • Introduction to enthalpy of reaction 10 5
  • Enthalpy of formation 10 1
  • Hess’s law 10 2
Unit 7: Equilibrium (60) 25
  • Introduction to equilibrium 10 5
  • Calculating the equilibrium constant 10 5
  • Calculating equilibrium concentrations 10 6
  • Introduction to solubility equilibria 10 8
  • pH and solubility 10 1
  • Free energy of dissolution 10 0
Unit 8: Acids and Bases (100) 24
  • Introduction to acids and bases 10 4
  • pH and pOH of strong acids and bases 10 7
  • Acid-base reactions and buffers 20 10
  • Molecular structure of acids and bases 20 0
  • pH and pKa 20 3
  • Properties of buffers 20 0
Unit 9: Applications of Thermodynamics (119) 16
  • Introduction to entropy 20 5
  • Gibbs free energy and thermodynamic favorability 20 3
  • Thermodynamic and kinetic control 20 2
  • Free energy and equilibrium 20 0
  • Galvanic (voltaic) and electrolyte cells 19 5
  • Electrolysis and Faraday’s law 20 1
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Previous Year Free Response Questions (0) 35
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  • AP Chemistry 2019 (0) 7