Grade 12 â Rates of reaction review terms

- Important terms and concepts
- Rate
- Rate law
- Order of reaction
- Law of mass action
- Photochemical reactions
- Positive catalyst
- Negative catalyst
- Homogenous catalyst
- Heterogeneous catalyst
- Mechanism of reaction
- Elementary steps
- Units of the different order
- Rate constant k
- Difference between order and molecularity
- Pseudo unimolecular reactions
- Initial rate method
- Graphical method for determining order
- Integrated rate law method
- Collision theory
- Factors affecting rates of reaction
- Energy of activation
- Threshold energy
- Transition state
- Graphs for single step reactions
- Graphs for multi steps reaction
- Energy of activation for reverse reactions
- Orientation and its effect on rates of reaction
- Energy of activation and its effect on rates of reaction
- Calculation of Activation energy
- Calculation of order of reaction from initial rate method
- Calculation of rate constant from rate law
- Calculation of concentration for first order reactions after time âtâ
- Calculation of rate constant or decay constant from half life
- Calculation of rate of reaction from concentration and time
- Explanation of Maxwell Boltzmann distribution curve
- Arrhenius equation

Problems – You ought to be familiar with the following type of problems – that does not mean all these types of problems will be present in your test. Variations of these problems can be given either as MCQ or Mathematical Problems.

- Determination of rate from concentration / volume / pressure etc and time
- Determination of order by initial rate method – problems
- Determination of rate constant ‘k’
- Determination of average rate and instantaneous rate from a graph
- Relation between rate and concentration change for determining order
- Determination of concentration / time / rate constant from integrated rate law and half life
- Arrhenius equation and determination of Ea or energy of activation
- Determination of rate constant k / Ea / or effect of temperature on rate of reaction with change in temperature using modified Arrhenius equation
- Determination of concentration of reactants after ‘n’ half lives

Format of test

- Fill in the blanks = ????
- Multiple Choice Questions =
- Short Answers and Problems =
- Total =

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