Kinetics Overview — AP Chemistry
1. Unit at a Glance
This unit progresses incrementally from foundational measurements of reaction speed to a molecular-level understanding of how reactions occur. We start by defining what reaction rate is and how to calculate it, then explore how concentration impacts rate through rate laws, followed by the underlying collision model and energy profiles that explain reaction behavior.
We end by connecting individual elementary reaction steps to full multistep reaction mechanisms, and finish with the role of catalysts in modifying reaction rates. This sequence builds the skills you need for both AP multiple choice and free response questions.
Common Pitfalls
Why: Rate order can only be determined experimentally, not from overall reaction stoichiometry
Why: Different reaction orders produce straight lines for different plots of concentration vs time
Why: Catalysts are regenerated in the reaction mechanism and do not change the total energy of reactants or products