R2.2 Rates of Reactions
(How Much?)
Learning Objectives
2.2.1: Rate of Reaction: Define the rate of reaction and calculate average and instantaneous rates using concentration and time data.
2.2.2: Collision Theory: Explain the conditions required for a successful chemical reaction according to collision theory, including energy and orientation.
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2.2.3: Factors Affecting Rate: Describe how changes in temperature, concentration, surface area, and catalysts affect the rate of a chemical reaction.
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2.2.4 & 2.2.5: Activation Energy & Catalysts: Define activation energy and describe its role in reaction mechanisms; explain how catalysts function by providing alternative pathways with lower activation energy.
Higher Level
2.2.6, 2.2.7 & 2.2.8: Multistep Reactions (HL): Deduce intermediates and catalysts from a proposed mechanism and determine the rate-determining step based on mechanistic reasoning and molecularity.
2.2.9, 2.2.10 & 2.2.11: Rate Law (HL): Use experimental data to deduce the rate law, determine reaction orders, and calculate the rate constant with appropriate units.
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2.2.12 & 2.2.13: Arrhenius Equation (HL): Use the Arrhenius equation to determine the activation energy and explain how temperature and activation energy affect the rate constant.