Formulae on Purification Characterization Organic Compounds


 


1
Crystallization
Crystallization involves the preparation of saturated solution of the given compound in a suitable solvent at a temperature below its boiling point.



2
Sublimation
Sublimation is employed for those subtances which change directly from solid to gas on heating and on cooling back to solid. It is employed for those substances which have high vapour pressure at normal atmospheric pressure eg. Camphor, Indigo, Benzoic Acid, Naphthalene etc.,



   3
Distillation
Involves conversion of a liquid into its vapours by heating and condensing the vapours to liquid by cooling.



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