Master AP Chemistry Topic 5.5 with this free practice quiz. Test your skills on effective collisions, activation energy, correct orientation, and temperature effects to prepare for your AP exam. Reactions Happen in Collisions The collision model explains rates at the particle level. Reactant particles move constantly, and a reaction can only happen when the particles … Read more
Master AP Chemistry Topic 5.4 with this free practice quiz. Test your skills on unimolecular, bimolecular, termolecular reactions, and direct rate laws to prepare for your AP exam. A Single Molecular Event An elementary reaction is a reaction that takes place in one single step, exactly as its equation is written. One molecular event occurs: … Read more
Master AP Chemistry Topic 5.3 with this free practice quiz. Test your skills on integrated rate laws, linear graphs, and first order half life to prepare for your AP exam. From a Rate at an Instant to a Concentration at a Time A rate law such as rate = k[A]² gives the rate at one … Read more
Master AP Chemistry Topic 5.2 with this free practice quiz. Test your skills on method of initial rates, reaction orders, rate constant, and units of k to prepare for your AP exam. The Rate Law: Rate Written in Terms of Concentration A rate law links the rate of a reaction to the reactant concentrations at … Read more
Master AP Chemistry Topic 5.1 with this free practice quiz. Test your skills on rate of appearance, rate of disappearance, relative rates, and stoichiometry and rates to prepare for your AP exam. What the Rate Measures A reaction rate measures how fast a concentration changes. It is the change in concentration of a reactant or … Read more
Master AP Chemistry Topic 4.9 with this free practice quiz. Test your skills on oxidation numbers, oxidizing agents, reducing agents, and half reactions to prepare for your AP exam. Redox Means Electrons Change Hands Oxidation is the loss of electrons. Reduction is the gain of electrons. The memory hook is OIL RIG: Oxidation Is Loss, … Read more
Master AP Chemistry Topic 4.8 with this free practice quiz. Test your skills on bronsted lowry theory, proton donors and acceptors, and conjugate acids and bases to prepare for your AP exam. Two Definitions of an Acid The older definition is Arrhenius: an acid produces H⁺ ions in water, a base produces OH⁻ ions in … Read more
How to Use This Worksheet Work in order. Section A checks the ideas: what transmittance and absorbance mean, what each symbol in A = εlc does, and how a calibration curve is built and read. Section B builds the calculations: finding ε, converting between absorbance and transmittance, scaling with path length, and reading unknowns from … Read more
Master AP Chemistry Topic 4.7 with this free practice quiz. Test your skills on acid base reactions, redox reactions, precipitation reactions, and reaction classification to prepare for your AP exam. Two Ways of Sorting the Same Reaction Chemists sort reactions in two independent ways; one reaction normally takes a label from each. The first sorts … Read more
Light In, Light Out: Transmittance A spectrophotometer shines light of one chosen wavelength through a sample and compares what comes out with what went in. Transmittance, T, is the fraction that gets through: T = I/I₀, where I₀ is the intensity entering and I the intensity leaving. It is often quoted as a percentage, %T … Read more