AP Chem Units 5–9 Survival Guide

Tomorrow is the AP Chemistry exam, so this guide is built for fast, high-impact review of Units 5–9—the section where students often lose points on rate laws, equilibrium, acids and bases, entropy, and electrochemistry. Instead of overwhelming you with every tiny detail, this article focuses on the must-know concepts, rules and formulas to memorize, common question patterns, and easy mistakes to avoid before test day. You’ll review:

• Kinetics: rate laws, reaction order, mechanisms, catalysts, and collision theory
• Thermodynamics: enthalpy, Hess’s law, entropy, and Gibbs free energy
• Equilibrium and acids-bases: Le Châtelier’s principle, K expressions, buffers, pH, and titrations
• Applications of thermodynamics: galvanic vs. electrolytic cells, cell potential, and spontaneity Think of this as your last-night roadmap to the ideas, shortcuts, and memory tools the AP exam loves to test.