- Ask pupils to use chromatography to compare the components of dyes,
eg the colouring on sugar-coated chocolate sweets, to find out whether different colours include the same dyes and to explain what they found,
eg using drawings and annotated diagrams. Extend by providing pupils with prepared chromatograms and information about the contexts in which these might be needed,
eg in forensic science, in identifying traces of substances in urine or medical preparations, and asking them to interpret the evidence from each chromatogram.
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- interpret chromatograms, explaining what the evidence shows
- describe a situation in which chromatography provides useful evidence
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