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Cambridge IGCSE Chemistry practice

Paper 6 structured question: Rate of reaction

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Rate of reaction

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Paper 6Alternative to PracticalPractical2 marks

Investigating the effect of temperature on the rate of a reaction.

Results Table

Results of Temperature Effect on Reaction Rate

The table shows the time taken for a reaction to complete at different temperatures.

Temperature (°C)Time taken (s)
2060
3045
4030
5020
  1. a

    Describe the trend shown in the results table.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 6 structured question: Rate of reaction

Paper 6Alternative to PracticalPractical1 marks

Method

Method to Measure Reaction Rate

In this experiment, hydrochloric acid is added to sodium thiosulfate solution. The time taken for the solution to turn cloudy is recorded.

Time (s)Concentration of Sodium Thiosulfate (mol/dm³)
100.1
200.2
300.3
400.4
  1. a

    State the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]