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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Rate of reaction

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Rate of reaction

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Paper 3Theory (Core)1 marks

The effect of temperature on the rate of a reaction is being studied.

Description

Temperature and Reaction Rate

A reaction between two chemicals is observed at different temperatures. The rate of reaction is measured in seconds for each temperature setting.

Temperature (°C)Rate of Reaction (s)
2030
4015
605
802
  1. a

    State the trend observed in the rate of reaction as temperature increases.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Rate of reaction

Paper 3Theory (Core)1 marks

Description

Concentration and Reaction Rate

A series of experiments are conducted to measure the rate of reaction between hydrochloric acid and sodium thiosulfate at different concentrations.

Concentration (mol/dm³)Rate of Reaction (s)
0.160
0.230
0.315
0.47.5
  1. a

    State the relationship between concentration and the rate of reaction based on the data provided.

    Aim for approximately 1 distinct marking point.

    [1]