AP Chemistry
Review AP Chemistry study guides, quizzes, and flashcards covering chemical equilibrium, thermodynamics, and atomic structure.
Topics
Acids, Bases, and pH
Master the Brønsted-Lowry theory of proton donors and acceptors, conjugate acid-base pairs, and the amphoteric nature of water. From autoionization and pH calculations to Ka, Kb, and strong vs. weak dissociation, this pack covers the core mechanics of acid-base chemistry.
Aqueous Solutions and Solubility
Dissolve the key concepts behind aqueous solutions, from hydration and like-dissolves-like to Ksp, the common ion effect, and Henry's Law. This pack covers everything college chemistry students need to understand solubility equilibria and what drives dissolution at the molecular level.
Atomic Theory
Trace the evolution of atomic theory from Dalton's solid sphere to the quantum mechanical model while mastering protons, neutrons, orbitals, isotopes, and electron configuration — the core concepts every chemistry student needs to know.
Balancing Chemical Equations
Master the rules of balancing chemical equations, from applying stoichiometric coefficients and the Law of Conservation of Mass to handling polyatomic ions and phase labels. Learn the systematic approach of tackling complex elements first so you can confidently balance any reaction.
Buffers and Acid-Base Titrations
Master the mechanics of buffers and acid-base titrations, from applying the Henderson-Hasselbalch equation and maximizing buffer capacity to identifying equivalence points, half-equivalence points, and choosing the right indicator for any titration curve.
Chemical Kinetics
Master reaction rates, rate laws, and the Arrhenius equation as you work through reaction orders, rate-determining steps, and catalysis. This pack covers the core concepts college chemistry students need to understand how and why reactions speed up or slow down.
Determining Empirical and Molecular Formulas
Master the step-by-step process of converting percent composition and combustion analysis data into empirical and molecular formulas. Practice mole ratio calculations, whole-number scaling, and applying molar mass multipliers to move from simplest ratios to actual molecular formulas.
Electrochemistry and Redox Cells
Master the principles behind galvanic and electrolytic cells, from anode-cathode electron flow and salt bridge function to calculating E°cell, linking ΔG° = −nFE°cell, and applying the Nernst equation for non-standard conditions.
Electron Configuration and Atomic Structure
Break down electron configuration from the ground up — covering quantum numbers, the Pauli exclusion principle, Hund's rule, and the aufbau filling sequence. Learn to write nℓx notation, identify valence vs. core electrons, and understand anomalous cases like Cr and Cu.
Equilibrium Constants
Master the equilibrium constant expression, from writing Kc and Kp to interpreting Q vs. K and predicting reaction direction. Covers stoichiometric exponents, the Kp = Kc(RT)^Δn relationship, and rules for reversed or combined reactions.
Gases and Gas Laws
Master the core relationships governing gas behavior — Boyle's, Charles's, and Avogadro's Laws, the ideal gas law (PV = nRT), and real-gas corrections via the van der Waals equation. Covers Kinetic Molecular Theory and all four key variables: pressure, volume, temperature, and moles.
Hydrolysis of Salts
Unpack how dissolved salts produce acidic, basic, or neutral solutions by examining ion hydrolysis, the roles of conjugate acids and bases like acetate and ammonium, and how Ka, Kb, and Kw determine pH outcomes for every salt type.
Intermolecular Forces and States of Matter
Unpack the full hierarchy of intermolecular forces — from London dispersion and dipole–dipole interactions to hydrogen bonding and ion–dipole forces — and see how each shapes boiling points, viscosity, and states of matter.
Ionic and Covalent Bonding
Break down the key distinctions between ionic and covalent bonding, from electron transfer and electronegativity thresholds to polar vs. nonpolar character, bond order, bond length, and the roles of lattice energy and bond dissociation energy in compound stability.
Le Châtelier’s Principle
Master Le Châtelier's Principle by examining how concentration, pressure, and temperature shifts drive equilibrium toward products or reactants — and why catalysts speed up equilibrium without changing its position or Kc.
Lewis Structures
Master the step-by-step process of drawing Lewis structures, from counting valence electrons and applying the octet rule to identifying formal charges, resonance structures, and expanded octets in elements like sulfur and phosphorus.
Limiting Reactants
Master mole ratios, theoretical yield, and percent yield by working through limiting reactant problems step by step. This pack covers how to identify which reagent runs out first and calculate leftover excess reactant using stoichiometry.
Molecular Geometry
Master VSEPR theory and its role in predicting molecular shapes — from linear and tetrahedral to trigonal pyramidal and bent — while exploring how lone pairs compress bond angles and why symmetric geometry in molecules like CO₂ cancels bond dipoles entirely.
Oxidation Reduction Reactions
Master the mechanics of electron transfer with this pack covering oxidation states, reducing and oxidizing agents, and half-reaction balancing in both acidic and basic solutions — plus real-world applications in cellular respiration, combustion, and electrochemical cells.
Periodic Trends
Trace how atomic radius, ionization energy, electronegativity, and electron affinity shift across periods and down groups — and why. Master the competing forces of effective nuclear charge and electron shielding that drive every trend, including key exceptions at Groups 2 and 15.
pH and pOH Concepts
Master the math and logic behind pH and pOH, from logarithmic conversions and the pH + pOH = 14 relationship to Kw, autoionization of water, and identifying acidic versus basic solutions by ion concentration.
Solutions and Concentration
Master molarity, dilution, and solution stoichiometry — from calculating solute mass to applying M₁V₁ = M₂V₂ and using molarity as a conversion factor in reactions.
Stoichiometry and Mole Ratios
Master stoichiometry by working through balanced equations, mole ratios, and molar mass conversions to solve multi-step problems. Covers limiting reactants, theoretical yield, and the gram-to-mole pathway every chemistry student needs.
Thermodynamics and Gibbs Free Energy
Master the core of chemical thermodynamics by working through Gibbs free energy, the ΔG = ΔH − TΔS equation, and how temperature, enthalpy, and entropy together determine spontaneity.