Chemical kinetics is the study of reaction rates, factors affecting them, and the mechanisms by which reactions occur. The reaction rate is the speed at which reactants are converted into products. Several factors influence reaction rates, including reactant concentration, temperature, the presence of catalysts, and surface area.
In AP Chemistry, understanding how to calculate and interpret reaction rates is crucial. Rate laws express the relationship between reactant concentrations and the rate of the reaction. Integrated rate laws allow us to determine the concentration of reactants at a specific time. Mastering these concepts will significantly improve your performance on the AP Chemistry Exam.
Match the terms with their definitions:
| Terms | Definitions |
|---|---|
| 1. Rate Law | A. A substance that speeds up a reaction without being consumed. |
| 2. Catalyst | B. The change in concentration of reactants or products per unit time. |
| 3. Reaction Rate | C. An equation that relates the rate of a reaction to the concentrations of reactants. |
| 4. Activation Energy | D. The minimum energy required for a reaction to occur. |
| 5. Order of Reaction | E. The exponent to which a reactant's concentration is raised in the rate law. |
Complete the following paragraph with the correct terms:
The rate of a chemical reaction can be affected by several factors. Increasing the _________ of reactants generally increases the reaction rate because there are more frequent collisions between molecules. A _________ provides an alternative reaction pathway with a lower _________, thus speeding up the reaction. Additionally, increasing the _________ of the reaction mixture typically increases the reaction rate. The _________ describes how the rate depends on the concentration of each reactant.
Explain how collision theory relates to reaction rates, and describe two ways to increase the number of effective collisions between reactant molecules.
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