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Chemical analysis
Chromatography
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Created by
Grace Nunez
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Cards (7)
What is a solvent?
A
liquid
that will
dissolve
substances.
What is Chromatography good?
Because it can help us
identify
an
unknown
substance.
how do you calculate the Rf value for a substance?
Rf =
distance
travelled
by the
substance
/
distance
travelled
by the
solvent
What is the unit for Rf?
There is
no
unit.
What do you do if different substances have the same have the same Rf value?
Repeat
the
experiment
using a
different
solvent.
What happens if the substance has never been analysed before?
There will be
no
Rf
value
on the
database
, so we would need to carry out
further
analysis
to
identify
it.
Look at Paper 1 for further questions
: )