CLEP Chemistry study guide
CLEP Chemistry · Work through your exam, one topic at a time.
The CLEP Chemistry exam is a standardized, multiple-choice assessment that lets students earn college credit by demonstrating knowledge equivalent to a one-year general chemistry course. It is intended for self-directed learners-incoming college students, adult learners, and military personnel-who have already acquired the material through prior coursework, independent study, or laboratory experience and want to accelerate their degree without retaking introductory chemistry. The CLEP Chemistry study guide has 9 sections and about 2,396 words.
01Structure of Matter
Structure of matter questions test the link between atomic/molecular structure and observable properties. Be fluent in: subatomic particles and isotopes (protons define element, neutrons define isotope, electrons define charge); electron configuration and orbital filling (Aufbau, Pauli, Hund); periodic trends (atomic radius decreases across a period and increases down a group; ionization energy and electronegativity move opposite to radius); and bonding types.
293 words, about 1 min02States of Matter
Expect questions on the kinetic-molecular theory, gas laws, phase changes, and the properties of solids, liquids, and solutions. Master the ideal gas law PV = nRT, and its special cases: Boyle (P–V inverse at constant T), Charles (V–T direct), Gay-Lussac (P–T direct), and Avogadro (V–n direct).
282 words, about 1 min03Reaction Types
Classify reactions and predict products. The main categories: synthesis (A + B → AB), decomposition (AB → A + B), single replacement (A + BC → AC + B, driven by activity series), double replacement/precipitation (AB + CD → AD + CB, driven by formation of a solid, gas, or water), combustion (hydrocarbon + O2 → CO2 + H2O), and acid–base neutralization (acid + base → salt + water).
281 words, about 1 min04Equations and Stoichiometry
Stoichiometry is mole-ratio arithmetic. The core skill: balance the equation, convert given quantities to moles, apply the mole ratio from coefficients, and convert back to the requested unit (grams, liters of gas, particles).
252 words, about 1 min05Equilibrium
Equilibrium questions cover the equilibrium constant, Le Chatelier's principle, and acid–base/solubility equilibria. For aA + bB ⇌ cC + dD, K = [C]^c[D]^d / [A]^a[B]^b; pure solids and liquids are omitted.
264 words, about 1 min06Kinetics
Kinetics explains how fast reactions proceed. Key concepts: collision theory (molecules must collide with sufficient energy and correct orientation); activation energy (the energy barrier); and the effect of temperature, concentration, surface area, and catalysts on rate.
269 words, about 1 min07Thermodynamics
Thermodynamics predicts whether a reaction occurs spontaneously and how much energy it exchanges. Central quantities: enthalpy (ΔH, heat at constant pressure), entropy (ΔS, disorder), and Gibbs free energy (ΔG = ΔH − TΔS).
238 words, about 1 min08Descriptive Chemistry
Descriptive chemistry tests recognition of elements, compounds, and trends rather than heavy calculation. Know the periodic table layout: groups (columns) share valence electrons and properties; periods are rows.
253 words, about 1 min09Experimental Chemistry
Experimental chemistry covers lab technique, measurement, data analysis, and safety. Understand significant figures and precision vs accuracy; know how to read burets, graduated cylinders, and balances to the correct precision.
264 words, about 1 min