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Cambridge AS & A Level Chemistry

37.1Thin-layer chromatography

Thin-layer chromatography in Cambridge AS & A Level 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. 37.1.1Describe stationary phase, mobile phase, Rf value, solvent front and baseline.
  2. 37.1.2Interpret Rf values.
  3. 37.1.3Explain differences in Rf values by interaction with the stationary phase and solubility in the mobile phase.

Lessons

  • 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.

Thin-layer chromatography: sample question

1 mark

In thin-layer chromatography on silica, which substance is likely to have the highest Rf value with a non-polar solvent?

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