によって Trudy Kwek 13年前.
501
Separation
Various separation methods are employed to isolate different components from mixtures based on their physical and chemical properties. Reverse osmosis is a technique used primarily for desalinating seawater by removing debris and contaminants through a semi-permeable membrane.
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Separation Methods Paper chromatography Uses of paper chromatography:
-To find the dyes used in ink
-To find the dyes used in food Paper chromatography is used to
separate small amounts of mixtures. Magnetic Attraction Uses of magnetic attraction:
-Food processing
-To salvage scrap iron and
steel Magnetic attraction can be used to separate
magnetic materials from those that are not
attracted by a magnet. Filtration The insoluble solid is called the residue
and the liquid that passed throught the filter
paper is called the filtrate Uses of Filtration
-Vacuum cleaners
-Coffee Makers Filtration can be used to separate an
insoluble solid from the liquid in a
liquid-solid mixture Evaporation Uses of evaporation
-to get salt from seawater The solid left behind as the residue Evaporation is used to separate a dissolved
solid from a liquid. The dissoled solid must
be stable to heat and not decompose. Reverse Osmosis In reverse osmosis, sea water is pre-treated
to remove debris and contaminants Fractional Distillation Uses of fractional distillation:
-To separate crude oil Fractional distillation is used to separate
more than two liquids in a mixture of
miscible liquids. Distillation Uses of distillation
-To make perfumes
-Desalination plants Distillation is used to separate a pure
liquid from a solid-liquid or liquid-liquid mixture
