Elements, Compounds and Mixtures
What is Filtration?
Filtration is a separation
technique that is
used to separate a solid
that has
not
dissolved in a
liquid
(for example a precipitate).
A filter paper is placed inside a
glass funnel
and a container put beneath.
The mixture
of the solid and liquid
is placed into the filter paper.
The liquid flows through the filter
paper and in to the container.
The liquid in the container
is called the filtrate.
The solid that remains in
the filter paper is called the
residue.
The residue can be dried by spreading it out on the filter paper
and allowing the liquid to
evaporate.
A solid that dissolves
in a liquid
can be separated
by crystallisation.
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