Some mixtures have several different substances ____ in a liquid. ____ can help us separate them out, so that we know what substances are present. Samples of the mixtures we want to study are placed along a line drawn in ____ on some special absorbent paper. The end of the paper is dipped into a ____. As the solvent moves up the paper, it separates the mixtures. As all the solutes in the mixtures move up the paper at different ____, they become separated. Eventually each ____ comes out of ____ and onto the paper at a different point. We can compare the solute "spots" with the position of spots made by ____ materials, and so work out what is in each mixture.

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