149159
Coursework- Aspirin
- Risk Assessment
- Ethanoic anhydride
- Aspirin
- Salicylic acid
- Iron (III) Chloride
- Chromatography solvent
- Glacial Acetic acid
(pure ethanoic acid)
- Conc. Sulphuric acid
- Sodium Hydroxide
- Hydrochloric Acid
- Ethanoic anhydride
- Experiments I am doing
- Make Aspirin with Salicylic acid
and ethanoic anhydride (Conc.
Sulphuric acid catalyst).
- Recrystalise
my made
aspirin using hot
water as the
solvent.
- Test the purity of the
recrystalised aspirin compared
with the un-recrystalised aspirin,
salicylic acid and pure aspirin
using thin layer
chromatography.
- Use a colorimeter to
test the concentration of
salicylic acid in the
un-recrystallised aspirin,
by comparing to known
concentrations of
salicylic acid solutions
(using Iron (III) Chloride.
- Test the purity of shop
bought aspirin by titrating with
Sodium Hydroxide (assay).
- Use Iron (III)
Chloride to test the
purity of my aspirin
qualititively
- Back titration- Reflux
aspirin with NaOH and
then titrate with HCl to
see how much NaOH
has reacted.
- Melting Point test- see how
the melting points vary,
impurities will have an
impact on the melting point
of the different aspirins.
- Make Aspirin with Salicylic acid
and ethanoic anhydride (Conc.
Sulphuric acid catalyst).
- Chemicals I will need
- Chromatography Solvent
- Ethanoic anhydride
- Glacial Acetic acid?
- Shop bought
aspirin tablets
(1 packet)
- Pure aspirin powder
- Salicylic acid
- Iron (III) Chloride
- Conc. Sulphuric Acid
- Sodium Hydroxide
- Hydrochloric acid
- Chromatography Solvent
- Equipment needed
(apart from beakers
etc which I can get
in the lab)
- Reflux apparatus
- Fume cupboard
- Chromatography plates
- Pestle and Mortar
- Top pan
balance (2 d.p.
minimum)
- Filter paper
- Buchner funnel
- Cling film
- Colourimeter
- spatula
- Weighing boat or one
of the test tubes
which have screw on
lids (Sorry I cannot
remember their
name)
- Reflux apparatus
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