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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Electrolysis

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Electrolysis

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Paper 4Theory (Extended)1 marks

Electrolysis of sodium chloride solution produces chlorine gas at the anode and hydrogen gas at the cathode.

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Electrolysis of Sodium Chloride

During the electrolysis of sodium chloride solution, chlorine gas is produced at the anode and hydrogen gas at the cathode. Write the ionic half-equations for the reactions occurring at both electrodes.

  1. a

    State the ionic half-equation for the reaction at the anode.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Electrolysis

Paper 4Theory (Extended)1 marks

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Electrolysis of Copper(II) Sulfate

During the electrolysis of copper(II) sulfate solution, copper is deposited at the cathode and oxygen is produced at the anode. Write the ionic half-equations for the reactions occurring at both electrodes.

  1. a

    State the ionic half-equation for the reaction at the cathode.

    Aim for approximately 1 distinct marking point.

    [1]