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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Identification of ions and gases

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3

Paper

2

Marks

Topic

Identification of ions and gases

Exam-style question

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Paper 3Theory (Core)2 marks

Identifying cations in a laboratory setting.

Description

Cation Identification Tests

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

  1. a

    Outline the test for identifying iron(II) ions using sodium hydroxide.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Identification of ions and gases

Paper 3Theory (Core)3 marks

Description

Cation Identification Tests

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

  1. b

    Describe the test for identifying zinc ions using sodium hydroxide.

    Aim for approximately 3 distinct marking points.

    [3]