AQA - AS and A-Level Chemistry

The qualitative effect of temperature changes on the rate of reaction.
Students could investigate the effect of temperature on the rate of reaction of sodium thiosulfate and hydrochloric acid by an initial rate method.

Students could determine the order of reaction for a reactant in the iodine clock reaction.

A simple colorimeter can be used to determine the concentration of coloured ions in solution.
PS 3.1 and 3.2 Students could determine the concentration of a solution of copper(II) ions by colorimetry.
MS 3.1 and 3.2 Students determine the concentration of a solution from a graph of absorption versus concentration.
AT a, e and k Students could determine the concentration of a coloured complex ion by colorimetry.

AT a, b and k PS 4.1 Students could follow instructions when carrying out test-tube hydrolysis of halogenoalkanes to show their relative rates of reaction.

8.1 Use of apparatus and techniques
Measure rates of reaction by at least two different methods, for example:
• an initial rate method such as a clock reaction
• a continuous monitoring method

8.2 Required practical activities
Required practical 7
Measuring the rate of reaction: [suggest iodination of propanone]
• by an initial rate method
• by a continuous monitoring method