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)3 marks

Electrolysis of water.

Description

When an electric current is passed through water, it decomposes into hydrogen and oxygen gases.

a
Explain the process of electrolysis of water, including the products formed at each electrode.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)1 marks

Description

When an electric current is passed through a solution of sodium chloride, the solution undergoes electrolysis.

a
State the products formed at the anode during the electrolysis of sodium chloride solution.
Your answer
Aim for approximately 1 distinct marking point.
[1]