AQA Chemistry Chromatography



One method of separating substances in a mixture is chromatography. Chromatography can be used to separate different dyes in an ink.

Filter paper

Spot of Ink

Pencil Line

1) Draw a line near the bottom of a sheet of filter paper. (Use a pencil to do this pencil marks won't dissolve in the solvent.).

2) Add a spot of ink to the line.

3) Pour a small amount of solvent into a beaker so it forms a shallow layer.

4) The solvent used depends on what's being tested. Some compounds dissovle well in water, but sometimes other solvents, like ethonal,


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