Choosing a method of separation

You’ll have to choose the best separation technique when you’re asked to separate the components of a mixture. This table can help:

MixtureSeparating techniqueExample
Insoluble solid and liquidFiltrationSand and water
Soluble solid and liquid (solution)Crystalisation (by evaporation)Salt water (sodium chloride solution)
Two miscible liquidsDistillationEthanol and water
Soluble solids dissolved in a solventPaper chromatographyFood colourings, dyes and inks