Cambridge IGCSE Combined Science practice

Paper 3 structured question: Identification of ions and gases

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At a glance

Paper

Marks

Topic

Identification of ions and gases

Exam-style question

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Paper 3Theory (Core)3 marks

Identifying cations in a laboratory setting.

Description

You are provided with solutions containing various cations. You need to identify the cations using sodium hydroxide and ammonia.

b
Describe the test for identifying zinc ions using sodium hydroxide.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)2 marks

Description

You are provided with solutions containing various cations. You need to identify the cations using sodium hydroxide and ammonia.

a
Outline the test for identifying iron(II) ions using sodium hydroxide.
Your answer
Aim for approximately 2 distinct marking points.
[2]