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All Key Terms
AP Chemistry
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AP Chemistry
Key Terms
1585 essential vocabulary terms and definitions to know for your AP Chemistry exam
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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
3.10 Solubility
3.11 Spectroscopy and the Electromagnetic Spectrum
3.12 Photoelectric Effect
3.13 Beer-Lambert Law
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
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
5.10 Multistep Reaction Energy Profile
5.1 Reaction Rates
5.11 Catalysis
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
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
7.10 Reaction Quotient and Le Châtelier’s Principle
7.1 Introduction to Equilibrium
7.11 Introduction to Solubility Equilibria
7.12 Common Ion Effect
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
Unit 8 – Acids & Bases
8.10 Buffer Capacity
8.1 Introduction to Acids and Bases
8.11 Multiple Choice Questions
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
Unit 9 – Thermodynamics and Electrochemistry
9.10 Electrolysis and Faraday's Law
9.1 Introduction to Entropy
9.11 Multiple Choice Questions
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
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(CH3)3N
[Ca²⁺]
[Cl⁻]
ΔE
ΔG
ΔG < 0
ΔG°
ΔH
ΔH (Change in Enthalpy)
ΔHrxn (Delta H reaction)
ΔH°
ΔH° and ΔH
∆Hfus
∆Hvap
∆S
100% Products
100% Reactants
1s Orbital
1s peak
298 K
2O₃ ⇌ 3O₂
2p Orbital
2s Orbital
5% Approximation Rule
A
Absolute Enthalpy of a System (H)
Absolute Entropy
Absolute Zero
Absorbance
Absorbs
Absorption of Light
Abundance
Abundance of Isotopes
Acetate Buffer
Acetate Ions
Acetic Acid
Acetic Acid (CH₃COOH)
Acetylene
Acid
Acid Concentration
Acid form
Acid Strength
Acid-Base Catalysis
Acid-Base Indicator
Acid-Base Indicators
Acid-Base Neutralization Reaction
Acid-Base Reactions
Acid-base titration
Acid-Base Titrations
Acid/conjugate base pair
Acidic Hydrogens
Acidic Salt
Acidic Solution
Acidity
Acids
Activated Complex
Activation Energy
Adding Reactions Together
Adhesive Forces
Ag+ Ion
AgCl
AgI
Ag₂CrO₄
Air
Al3+ Ion
Albert Einstein
Alkali Metal
Alkali Metal Hydroxides
Alkali metals
Alkaline Metal Hydroxides
Alloy
Alloys
Alumina
Aluminium
Aluminium Nitrate
Aluminum
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