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Learning objective

Acknowledge that some substances in water are beneficial, including dissolved oxygen for aquatic life and certain metal compounds that provide essential minerals.

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Cambridge IGCSE ChemistryChemistry of the environmentCore content

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Acknowledge that some substances in water are beneficial, including dissolved oxygen for aquatic life and certain metal compounds that provide essential minerals

  • This point belongs to Water, especially Water outcomes.
  • You need to be able to acknowledge that some substances in water are beneficial, including dissolved oxygen for aquatic life and certain metal compounds that provide essential minerals.
  • The key ideas to know are State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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State

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Paper 3 structured question: Water

Paper 3Theory (Core)1 marks

Description

Dissolved Substances in Water

Water contains various dissolved substances that can be beneficial or harmful to aquatic life. Dissolved oxygen is essential for fish, while certain minerals from metal compounds are necessary for health.

  1. a

    State one beneficial substance found in water and its importance.

    Aim for approximately 1 distinct marking point.

    [1]
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