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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Electrolysis

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Electrolysis

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Paper 3Theory (Core)1 marks

Electrolysis of different substances

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Electrolysis of Molten Lead(II) Bromide

During the electrolysis of molten lead(II) bromide, lead is deposited at the cathode and bromine gas is released at the anode.

  1. a

    State the products formed at the electrodes during the electrolysis of molten lead(II) bromide.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Electrolysis

Paper 3Theory (Core)2 marks

Description

Electrolysis of Concentrated Aqueous Sodium Chloride

During the electrolysis of concentrated aqueous sodium chloride, hydrogen gas is produced at the cathode and chlorine gas at the anode.

  1. a

    Describe the observations made during the electrolysis of concentrated aqueous sodium chloride.

    Aim for approximately 2 distinct marking points.

    [2]