Distillation- used to separate liquids from dissolved solids.
Example: purified tapwater by removing minerals. The mineral water is evaporated and only the water evaporates as the solid minerals have much higher boiling points. The steam is then pure and can be condensed and the water collected will also be pure.
Fractional distillation- use to separate two or more liquids. Works when the liquids have different boiling points and can be evaporated at different temperatures. Done using a fractionating column.
Filtration see previous card.
Crystallisation see previous card.
Paper chromatography- can be used to find out which coloured compounds the mixture contains. When is solvent moves along the ***** of paper it carries the different substances in a mixture of different speeds so they are separated. Solvent called mobile phase, paper contains stationary phase.
Rf value=distance compound has risen/distance solvent has risen.
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