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8.1 Rates of reaction

8.1 Rates of reaction

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Question 68

A student investigated the rate of the catalytic decomposition of hydrogen peroxide using different physical forms of a manganese(IV) oxide catalyst.

The table below shows the results of their experiment:

Physical form of MnO2\text{MnO}_2MnO2​ catalystVolume of oxygen gas collected in 6 minutes in cm3\text{cm}^3cm3
Coarse granules27
Fine granules63
Ultrafine powder108

Calculate the average rate of reaction for the ultrafine powder of manganese(IV) oxide in cm3 s−1\text{cm}^3 \text{ s}^{-1}cm3 s−1.

[3]
Markscheme

8.1 Rates of reaction Questions

  1. GCSE
  2. /Chemistry
  3. /8.1 Rates of reaction

127 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.

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