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Cambridge IGCSE Chemistry

1.2Diffusion

Diffusion in Cambridge IGCSE Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
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Learning objectives

What the syllabus expects you to be able to do.

  1. 1.2.1Describe diffusion and explain it using the kinetic particle theory.
  2. 1.2.2Supplement: describe and explain how the relative molecular mass of a gas affects how fast it diffuses.

Lessons

  • Diffusion

    25 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Exam style

Diffusion: sample question

1 mark

Supplement. Cotton wool soaked in concentrated ammonia solution is placed in one end of a long glass tube, and cotton wool soaked in concentrated hydrochloric acid in the other end, at the same time. Where does the white ring of ammonium chloride form?

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