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ZIMSEC A-Level Chemistry

6.4.2.3Chromatography

Chromatography in ZIMSEC A-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic47 practice questions2 lessons
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Learning objectives

What the syllabus expects you to be able to do.

  1. 6.4.2.3.1Explain paper, high-performance liquid, ion-exchange, thin-layer, column and gas-liquid chromatography in terms of adsorption and/or partition.
  2. 6.4.2.3.2Show awareness of the applications of chromatography in industry and medicine.

Lessons

  • Gas-liquid chromatography and HPLC

    40 min

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  • Paper, thin-layer and column chromatography

    45 min

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Sample question

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

Chromatography: sample question

1 mark

The oven temperature of a gas chromatograph is raised from 80 °C to 120 °C, with everything else unchanged. What happens to the retention times?

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