Rates of Reaction

The following links offer some useful revision to support your learning:

BBC Bitesize – Rates of Reaction

BBC Bitesize Video – Rates of Reaction

Factors Affecting Rates of Reaction Practical Video

Average Rate of Reaction Practical Video

Miss Adams Video – Rates of Reaction

To help with your learning, you may also wish to try some of the following resources:

Rates of Reaction Quiz

Within the National 5 Chemistry course, you will need to know:

• To follow the progress of chemical reactions, changes in mass, volume and other quantities can be measured.
• Graphs can then be drawn and be interpreted in terms of:

1. end-point of a reaction
2. quantity of product
3. quantity of reactant used
4. effect of changing conditions

• Rates of reaction can be increased:

1. by increasing the temperature
2. by increasing the concentration of a reactant
3. by increasing surface area/decreasing particle size
4. through the use of a catalyst

• Catalysts are substances that speed up chemical reactions but can be recovered chemically unchanged at the end of the reaction.
• The average rate of a chemical reaction can be calculated, with appropriate units.
• The rate of a reaction can be shown to decrease over time by calculating the average rate at different stages of the reaction.