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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Carboxylic acids

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4

Paper

5

Marks

Topic

Carboxylic acids

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Paper 4Theory (Extended)5 marks

Understanding the processes involved in the oxidation of ethanol is crucial for chemistry applications.

Description

Oxidation Processes

Ethanol can be oxidized to ethanoic acid through two main processes: chemical oxidation and biological oxidation. Chemical oxidation involves the use of acidified potassium permanganate, while biological oxidation occurs during vinegar production.

  1. a

    Explain how ethanoic acid is produced through the oxidation of ethanol using acidified potassium permanganate.

    Aim for approximately 3 distinct marking points.

    [3]
  2. b

    Describe the role of bacteria in the production of ethanoic acid.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Carboxylic acids

Paper 4Theory (Extended)1 marks

Description

Oxidation of Ethanol

Ethanol can be oxidized to produce ethanoic acid using different methods. One method involves chemical oxidation with acidified potassium permanganate, while another method uses bacteria during vinegar production.

  1. a

    State the two methods of producing ethanoic acid from ethanol.

    Aim for approximately 1 distinct marking point.

    [1]