Lesson Slideshow Section 01
Unit Summary Section 02
Key Concepts
Rate Law, Reaction Mechanisms, Arrhenius Plot, Rate Constant k
Assessment Objectives
Deduce rate laws, Propose multi-step mechanisms, Use Arrhenius equation
Prior Knowledge Needed
Collision theory, energy profiles, stoichiometry (R1.1)
IB Syllabus Reference
R2.2
Interactive Study GuideClick here to view the full, detailed topic summary for this unit.
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Cu
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Video Lesson Section 03
HL Video Lessons
1 Extensions Available
Rate Laws [HL]
Practice Quiz Section 04 · Interactive
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Ne
20.180
Vocabulary Review Section 05
Arrhenius Equation
Math model linking the rate constant $k$ to temperature and Activation Energy.
Molecularity
The number of individual particles participating as reactants in an elementary step.
Heterogeneous Catalyst
A catalyst that is in a different phase from the reactants.
Rate Law
Expression relating the rate of reaction to the concentrations of reactants.
Half-life ($t_{1/2}$)
The time taken for the concentration of a reactant to decrease by half (Constant for 1st order).
Arrhenius Plot
A graph of $\ln k$ vs $1/T$ used to find activation energy via the gradient ($-E_a/R$).
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Fe
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Revision Notes Section 06
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Au
196.967
Practice Tests Section 07
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Cl
35.45
Worksheets & Labs Section 08