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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Identification of ions and gases

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Identification of ions and gases

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Paper 3Theory (Core)1 marks

Identifying cations in a laboratory setting.

Description

Cation Identification Tests

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

  1. a

    State the observation when NaOH is added to a solution containing copper(II) ions (Cu²⁺).

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Identification of ions and gases

Paper 3Theory (Core)3 marks

Description

Cation Tests

Describe the test for identifying iron(III) ions (Fe³⁺) using sodium hydroxide.

  1. a

    Describe the test for iron(III) ions using sodium hydroxide.

    Aim for approximately 3 distinct marking points.

    [3]