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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Preparation of salts

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Preparation of salts

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Paper 4Theory (Extended)4 marks

Chemical reactions in solution.

Description

Insoluble Salt Formation

When two soluble salts are mixed, an insoluble salt may form as a precipitate.

  1. a

    Explain the significance of precipitation reactions in chemistry.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Preparation of salts

Paper 4Theory (Extended)3 marks

Description

Precipitation Reaction

When solutions of barium chloride and sodium sulfate are mixed, a white precipitate forms.

  1. a

    Describe the process of preparing barium sulfate through precipitation.

    Aim for approximately 3 distinct marking points.

    [3]