how distillation separates compounds - based on different boiling points, when is fractional distillation useful? - when the boiling points are very similar, when filtering can separate mixtures? - if one compound is insoluble, how to calculate Rf value? - = distance travelled by spot / distance travelled by solvent, melting point of a PURE substance - has a fixed melting point, melting point of a mixture - has a range of melting points and is lower, sodium chloride is - a compound made from sodium and chlorine, sea water is - a mixture of water and dissolved salt, air is - a mixture of nitrogen, oxygen, argon and CO2, purification of water stages - sedimentation --> filtration --> chlorination, sedimentation removes... - large rocks and other debris, chlorination kills... - bacteria,

CC02 Separating mixtures

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