Unit 4 - Laboratory Techniques and their Application
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Unit 4b -Explore the manufacturing techniques and testing methods for an organic liquid
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Unit 4 - Laboratory Techniques and their Application
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PEARSON (PEARSON)
This document will showcase an investigation on Ethyl Ethanoate, there are photos of the experiment and also calculations and formulas. Conclusions that will talk about esterification with some advantages and disadvantages.
- how to assess the liquids yield and purity?
with references within th...
Unit 4 - Laboratory Techniques and their Application
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Unit 4: Laboratory Techniques
and their application
B: Explore the manufacturing
techniques and testing methods
for an organic liquid
Nikki C. Moslares
BTEC Level 3 Applied
Sciences
, Introduction:
Ethyl Acetate and butyl acetate are chemically known as Esters are created from
carboxylic acid and alcohol, they tend to have a distinct scent that are often seen
on products like a nail polish, perfume and as an artificial flavouring.
Hypothesis: By a strong acid catalyst, a fragrant ethyl ethanoate is formed.
Materials:
Beaker
Round Bottomed Flask
Ethanol
Reflux condenser
Heating mantle
Anti-bumping granules
Spatula
Conical flask
Separating funnel
Magnetic stirrer
Clamp stand and boss
Chemicals (Ethanoic acid, Sulfuric acid, Sodium Carbonate, Ethanol and
Calcium chloride)
Method:
Preparing Ethyl Ethanoate
1. The round flask and beaker was weighed on a balance. (Exact mass of
Ethanol = 10 cm3 density note, 0.789 gm−3 in every shaped flask)
2. 12 cm3 of Ethanoic acid and 10 cm 3 of H2SO4 was mixed to promote a
forward reaction. (the acid will be a catalyst for the reaction), anti-
bumping granules are added to mix it properly.
3. A reflux condenser was joined to the flask and placed lower unto the
heating mantle which is lifted up with a retort stand.
4. The water that will come into the condenser was turned on (CW in at the
lower inlet), this is to provide a reduced temperature on the condenser
before heating. The flask was heated for 20 minutes.
5. During the refluxing, the amount of moles of ethanol (mass/Mr) = mass
of ethanol/46.
6. Now, the simmered reflux liquid consists of Ethyl ethanoate with water
and few impurities, the ester that has the lowest boiling point will then be
refined first.
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