GCSE level Chemistry exam revision notes: 'RATES'

INDEX of rates of reaction notes - rate factors controlling speed, investigation methods & particle collision theoretical explanations

Collision theory particle concept 'picture'

Red + green represent reactants, blue + purple represent products, white represents reactants gone!

Fruitful collisions = chemical change, if only it were that simple!, lots of factors to consider!

See also biology enzyme pages for x-referencing investigation experiments

1. An INTRODUCTION to REACTION RATES

A general introduction of two sections, then applied to sections 3a to 3e

Use sub-indexes to find e.g.

What do we mean by the rate/speed of reaction?

Why is it important to know how fast reactions occur?

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

Introduction to experimental methods for measuring the rate of a chemical reaction

2. Collision theory of chemical reaction rate factors and activation energy

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 mixture of a solution-solid reaction

3d Effect on rate of reacting on changing the temperature of reactants

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

3f Light initiated reactions - effect of changing light intensity - examples explained

Data and graphs

4. Examples of graphs of rate data, interpretation a summing up of ways your rate data can be analysed and interpreted including using a tangent graphical method

See also linked to section 3e

Biology enzyme pages for x-referencing investigation experiments

Activation energy and reaction profiles and effect of catalysts

Enzymes - biological catalysts, optimum pH or temperature, use in biotechnology (GCSE level chemistry)

Enzymes - structure, function, optimum conditions, investigation experiments (GCSE level biology notes)

GCSE Level MULTIPLE CHOICE QUIZ on RATES of reaction

GCSE Level Combined QUIZ on rates of reaction, reversible reactions, equilibrium. Le Chatelier's Rules

Sections 5 to 7 are for Advanced Level Chemistry Students ONLY (separate page)

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!

UK GCSE, IGCSE and US grade 8-10 Level RATES QUIZ QUESTIONS and WORKSHEETS printout or online:

GCSE Level MULTIPLE CHOICE QUIZ on RATES of reaction

GCSE Word-fill quiz "What factors Affect the Speed of a Chemical reaction?"

CROSSWORD PUZZLE on rates of reaction and ANSWERS!

GCSE Level Combined rates of reaction QUIZ, reversible reactions & equilibrium - Le Chatelier's Rules

See also Reversible Reactions Notes

See also  Reversible reactions and Equilibrium Notes

Find your GCSE science course for more help links to revision notes