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Exam-style practice

Water answer explanations

Review worked answers and explanations for Water. Aligned to Cambridge IGCSE Combined Science.

Answer explanations

Question 1 of 6

Review the answer support, then move sideways through the set.

Paper 3 structured question: Water

Paper 3Theory (Core)4 marks

Description

Chemical Tests for Water

Anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate are used to identify the presence of water. Cobalt(II) chloride changes from blue to pink, while copper(II) sulfate changes from white to blue when water is present.

  1. a

    Explain the chemical tests used to identify water using anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate.

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