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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrolysis

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Electrolysis

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Paper 3Theory (Core)3 marks

Electrolysis is used in various industrial applications.

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Industrial Applications of Electrolysis

Electrolysis is utilized in processes such as electroplating, metal extraction, and water splitting.

  1. a

    Discuss the importance of electrolysis in industrial applications.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Electrolysis

Paper 3Theory (Core)3 marks

Description

Electrolysis of Sodium Chloride Solution

When sodium chloride (NaCl) is dissolved in water, it dissociates into sodium ions (Na+) and chloride ions (Cl-). When an electric current is passed through the solution, electrolysis occurs.

  1. a

    Explain the process of electrolysis that occurs when sodium chloride solution is electrolyzed.

    Aim for approximately 3 distinct marking points.

    [3]