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Y2KK update: This ISU does not belong to me. It belongs
to my sister, VivF. This was her Grade 13 Chemistry ISU project
and I'm posting it on the internet so that I'll never lose it.
I hope the little one is having so much fun at Western University...
Click Here for the Microsoft
Word '97 Doc
For Crystallization
1. Apparatus set-up: filtration unit built from · a stand
· a ring clamp
· a funnel
· filtration paper
2. Pour sample 1 into filter, catching
the component that goes through with a clean beaker. Rinse the
remaining sample in the beaker with methanol and pour it through
the filter.
3. Resolubilize the filtered silica
with methanol (to collect any remaining sample left) and filter
it through the funnel.
4. Repeat above steps for sample
2.
5. Heat samples on a bunsen burner
to evaporate some of the methanol (it does not require much heat),
making sure to constantly moving the container in a circular
motion. Continue doing so until approximately half the original
amount of volume of the sample is left. If the sample has evaporated
too much, add a small amount of methanol.
6. Cover the sample, leaving a small
opening and leave it to crystallize in a "dark, quiet spot.
7. Continually check the progression
of the crystallization for over-evaporation, precipitates, and
impurities that will require resuspension of the sample, the
addition of water or other solvents, and/or other methods.
8. When the first batch of crystal
sample is complete, continue recrystallizing the sample until
a satisfactory sample (of relative purity) is attained to be
sent and analyzed in a laboratory. |