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Edexcel IGCSE Chemistry 3.13 catalyst activation energy

Practise catalyst-pathway questions by linking lower activation energy to more successful collisions and faster reaction rate.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Explain that a catalyst provides an alternative pathway with lower activation energy.
  • Link lower activation energy to more particles having enough energy to react.

3.13 Catalysts and activation energy question 1

[Maximum number: 2]

A student uses this apparatus to investigate the decomposition of hydrogen peroxide solution.

Figure for Question 3.13 Catalysts and activation energy question 1 — Edexcel IGCSE Chemistry

This is the equation for the reaction.

2H2O2→2H2O+O22 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}

In this reaction, the manganese(IV) oxide acts as a catalyst.

Explain how a catalyst works.

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