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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Corrosion of metals

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Corrosion of metals

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Paper 4Theory (Extended)4 marks

Application of sacrificial protection in industry.

Description

Use of Sacrificial Anodes

In many industries, sacrificial anodes are used to protect pipelines and ships from corrosion.

  1. a

    Explain how sacrificial protection works using the reactivity series.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Corrosion of metals

Paper 4Theory (Extended)1 marks

Description

Sacrificial Protection

Sacrificial protection is a method used to prevent corrosion of metals by using a more reactive metal. This metal will corrode instead of the protected metal.

  1. a

    State the purpose of sacrificial protection.

    Aim for approximately 1 distinct marking point.

    [1]