Cambridge IGCSE Chemistry
12.3Chromatography
Chromatography in Cambridge IGCSE Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic18 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 12.3.1Describe how paper chromatography with a suitable solvent separates mixtures of soluble coloured substances.
- 12.3.2Interpret simple chromatograms to identify unknown substances by comparison with known substances and to tell pure from impure substances.
- 12.3.3Supplement: describe how paper chromatography separates mixtures of soluble colourless substances using a suitable solvent and a locating agent (knowledge of specific locating agents is not required).
- 12.3.4Supplement: state and use Rf = distance travelled by the substance ÷ distance travelled by the solvent.
Lessons
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Chromatography
30 min
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