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Chemistry
Chapter 18: Separation Techniques
Keywords
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Soluble
Substances that
dissolve
in water
Insoluble
The substance that not
dissolve
into liquid
Solvent
A liquid that
dissolves
a solid
Solute
A solid that
dissolves
in a liquid
Solution
A
liquid
with a
solid
dissolved in it
Solute
+
Solvent
→
Solution
Aqueous
Solution forms when a substance
dissolves
in
water
, it contains water with the state symbol is "aq"
Mixture
Two or
more substances
that are mixed together
Miscible
Two
or more liquid that
mixed
together
Immiscible
Liquid
that
can't
mix together
Volatile
Liquid
that
evaporates
easily
Impure
Unwanted substance
mixed in the
substance
that you want
Pure
A
substance
that only made up of
one
type of substance
Solubility
The mass of a solid required to
saturate 100
g of
water
at a given temperature
Saturated
solution
When no more solute can be
dissolved
in a
solvent
Apparatus
Equipment used in
science
Decanting
A process for the
separation
of mixtures of immiscible liquids. Eg:
separate
oil from water
Residue
Substance that stay on the
filter
paper after the
filtering
Filtrate
The
liquid
collected after the
filtering
process
Filtration
A method used to separate an
insoluble
solid from a
liquid
Evaporation
A method used to separate a
soluble
solid from a
liquid
Crystallization
A method used to get the crystal salt by using
saturated
solution
Simple Distillation
A method used to separate the
solvent
from the solution base on the
boiling
point
Fractional Distillation
A method used to separate a
solvent
from a mixture of solution, it separates the liquid with specific
boiling
point
Distillate
The liquid obtained from
distillation
process
Chromatography
A way of separating different
solute
dissolved in the same
solvent
Chromatogram
A
filter
paper with
coloured
spot of result
Rf value
(Retention factor)
Rf =
distance
moved by solute/
distance
moved by solvent front line
Purity of substance
The measure of the extent to which a given substance is
pure
Locating agent
A substance used to spray on the
chromatogram
to make the spot visible/show up. This is used on for the
colourless
amino acid
Mobile phase
The moving substances usually is the
solvent
Stationary
phase
The non-moving part such as
filter paper