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.
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.
