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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Rate of reaction

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Rate of reaction

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Paper 3Theory (Core)2 marks

The use of catalysts in chemical reactions is common in both laboratory and industrial settings.

Description

Role of Catalysts

Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. They provide an alternative pathway for the reaction with lower activation energy.

  1. a

    Explain how catalysts affect the rate of chemical reactions.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Rate of reaction

Paper 3Theory (Core)4 marks

Description

Importance of Catalysts

In many industrial processes, catalysts are essential for improving reaction rates and efficiency. They allow reactions to occur at lower temperatures and pressures, saving energy and costs.

  1. a

    Discuss the advantages of using catalysts in industrial processes.

    Aim for approximately 4 distinct marking points.

    [4]