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RATES of REACTION revision notes INDEX

Doc Brown's Chemistry KS4 science GCSE/IGCSE/O level Revision Notes

Advanced A Level KINETICS index

1. What do we mean by the rate/speed of reaction? An INTRODUCTION to REACTION RATES

Why is it important to know how fast reactions occur?

How can we measure the speed or rate of a chemical reaction?

Experimental methods are described in this introduction & subsequent sections

2. Collision theory of chemical reaction rate factors A general introduction, then applied to sections 3a to 3e

3. Factors affecting the speed/rate of a chemical reaction:

3a Effect on rate of changing reactant concentration in a solution/gas mixture

3b Effect on rate of changing pressure in reacting gases (gaseous equivalent of 3a)

3c Effect on rate of changing particle size/surface area & stirring of a solid reactant

3d Effect on rate of changing the temperature of reactants

3e Effect on rate of using a catalyst in a chemical reaction

Activation energy and reaction profiles

Enzymes - biological catalysts, optimum pH or temperature, use in biotechnology

3f Light initiated reactions - effect of changing intensity

4. Examples of graphs of rate data, interpretation a summing up of ways your rate data can be analysed and interpreted

Some ideas to help you with RISK ASSESSMENT when designing and performing 'Rates of Reaction' experiments and many other experimental procedures. Some aspects listed are applicable to 'rates/kinetics' assignments, others are not applicable at all. Its up to you to decide!


Sections 5 to 7 are for Advanced A Level Students ONLY


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An, INTRODUCTION to REACTION RATES, Why is it important to know how fast reactions occur?, How can we measure the speed or rate of a chemical reaction? Experimental methods are described in this introduction & subsequent sections, Collision theory of chemical reaction rate factors A general introduction Factors affecting the speed/rate of a chemical reaction: Effect on rate of changing reactant concentration in a solution/gas mixture, Effect on rate of changing pressure in reacting gases, Effect on rate of changing particle size/surface area & stirring of a solid reactant, Effect on rate of changing the temperature of reactants, Effect on rate of using a catalyst in a chemical reaction, Activation energy and reaction profiles, Enzymes - biological catalysts, optimum pH or temperature, use in biotechnology, Light initiated reactions - effect of changing intensity, Examples of graphs of rate data, interpretation a summing up of ways your rate data can be analysed and interpreted, suggestions and ideas to help you with RISK ASSESSMENT when designing and performing 'Rates of Reaction' experiments and many other experimental procedures. Some aspects listed are applicable to 'rates/kinetics' assignments, others are not applicable at all.

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