4.8.1 purity, formulations and chromatography
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9 Terms
what is a pure substance?
a single element or compound not mixed with any other substance
how can pure substances be distinguished from mixtures?
melting and boiling point data
what is a formulation?
a mixture that has been designed as a useful product
how are formulations made?
mixing the components in carefully measured quantities to ensure that the product has the required properties
what are examples of formulations?
fuels, cleaning agents, paints, medicines, alloys, fertilisers and foods
what is chromatography used for?
to separate mixtures and give information to help identify substances
what is the mobile phase in chromatography?
the phase that the ink moves
what is the stationary phase in chromatography?
the phase that the ink doesn’t move
what is the equation to work out the rf value?
Distance moved by substance divided by the Distance moved by solvent