AP Chemistry

The nine units, atoms to equilibrium

AP Chemistry is a college-level first-year chemistry course built around nine units and six 'science practices' — from the atom and the periodic table through bonding, intermolecular forces, reactions and stoichiometry, kinetics, thermodynamics, equilibrium, acids and bases, and electrochemistry. This journey walks the whole College Board Course and Exam Description: what the exam actually asks, the reasoning each unit rewards, and the worked calculations — moles, stoichiometry, pH, equilibrium, Gibbs free energy — that separate a 3 from a 5. Learn to think like a chemist: in particles, in energy, and in equilibrium.