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Separation Methods

Filtration, evaporation, extraction, distillation, etc.
by

Gertjan Goossens

on 14 December 2015

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Transcript of Separation Methods

Separation Methods
What kind of mixture?
solid/solid
solution
suspension
liquid/liquid
Filtration
Evaporation
Extraction
Distillation
Chromatography
colours
only for suspensions
suspension
filter
residue
filtrate
for solutions & suspensions
Separation Methods
for solid/solid mixtures
one of the solids is dissolving the other isn't
for mixtures of liquids & solutions
mixture of colours
difference in boiling point
1 heater
3 fractionating column
5 condenser
6 water in
7 water out
8. distilate
15. residue
cold water
condensing vapour
difference in particles sizes
difference in solubility
difference in
boiling point
salt
water
at boiling point
water evaporates
filter
difference in solubility & adhesion to the paper
base line
solvent front,
travelled 5cm
solvent
paper
yellow
red
How to calculate Rf value?
Rf value =
Distance from Baseline traveled by Solute
Distance from Baseline traveled by Solvent (Solvent Front)
Rf red = = 0,6
3
5
3cm
salt stays behind
some substances dissolve,
some don't
alcohol evaporates at
boiling point (78 C)

water stays behind
Full transcript