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chemistry
chromatography
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Cards (6)
draw pencil line across chromatography paper
1cm
from bottom
use a
pipette
to to add
small dots
of each food dye equally
spread
as well as
unknown
food dye
place paper into a beaker with a
solvent
(
water
) making sure
pencil line
is above
water
observe as
solvent rises
(
mobile phase
) but
remove paper
before it reaches
top
allow paper to
dry
, measure
how
distance travelled
by
solvent
and also
distance travelled
by each
pigment
in each
dye
Rf= distance travelled by
substance
/ distance travelled by
solvent