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12.3 Chromatography

Syllabus
0620–2026–2027
Topic
12.3
Level
—

12.3.1—Paper chromatography is used to

  • Describe how paper chromatography is used to separate mixtures of soluble coloured substances, using a suitable solvent

12.3.2—Interpret simple chromatograms to

  • Interpret simple chromatograms to identify: (a) unknown substances by comparison with known substances (b) pure and impure substances

12.3.3—Paper chromatography is used to

  • Describe how paper chromatography is used to separate mixtures of soluble colourless substances, using a suitable solvent and a locating agent Knowledge of specific locating agents is not required

12.3.4—And use the equation for Rf: Rf =

  • State and use the equation for Rf: Rf = distance travelled by substance distance travelled by solvent

Objective notes

4 learning objectives
ConceptIGCSE Chemistry