A series of free IGCSE Chemistry Activities and Experiments (Cambridge IGCSE Chemistry).
Paper chromatography is a good way of separating coloured substances mixed together in a solution. During chromatography, the solvent soaks up the paper past the spot of the mixture and the different substances move upwards too. They move different distances depending on what kind of substance they are, what the solvent is and how far the solvent itself travels.
The method allows us to compare an unknown substance with a known one. If two substances travel the same distance in the same experiment, they are probably the same substance.
In this experiment, we will show how to separate the ink from different coloured markers using paper chromatography.
How to use paper chromatography to separate soluble substances and identify an unknown compound?
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