Cambridge IGCSE Chemistry practice

Paper 3 structured question: Electrolysis

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Paper

Marks

Topic

Electrolysis

Exam-style question

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Paper 3Theory (Core)2 marks

Electrolysis of concentrated aqueous sodium chloride

Description

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

a
Describe the observations made during the electrolysis of concentrated aqueous sodium chloride.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)1 marks

Description

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

a
State the products formed at the electrodes during the electrolysis of molten lead(II) bromide.
Your answer
Aim for approximately 1 distinct marking point.
[1]