1 b) Elements, Compounds & Mixtures
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Compound
Two or more elements chemically combined in fixed proportions.
Fractional Distillation
Process to separate two liquids of similar boiling points.
Paper Chromatography
Process to separate a mixture of coloured substances.
Rf Value
Calculated as the distance moved by a spot divided by the distance moved by the solvent front on a chromatogram.
Simple Distillation
Process used to separate two liquids of different boiling points, or solvent from a solution.
Chromatogram
Absorbent paper showing the separation of different coloured substances.
Crystallisation
Process in which a solute (soluble solid) is obtained from its solvent.
Element
Cannot be split into anything simpler containing atoms of the same atomic number.
Filtrate
Liquid that comes through the filter paper during filtration.
Filtration
Process to separate an insoluble solid from a liquid.
Fractionating Column
Equipment used for separating vapours in fractional distillation.
Liebig Condenser
Equipment used to condense gas to liquid in distillation.
Miscible
Can mix with each other
Residue
Solid left on the filter paper during filtration.