H.
BTEC L3 EXTENDED DIPLOMA IN APPLIED SCIENCE
Unit 4: Laboratory Techniques and their
Application
Assignment 4B: Explore manufacturing techniques and
testing methods for an organic liquid
Preparation of ethyl ethanoate
Part 1
Equipment list
- Measuring cylinder
- Ethanoic acid
- Pear shaped flask
- Pipette
- Sulfuric acid
- Spatula
- Anti-bumping granules
- Condenser
- Clamp stands
- Clips
- Heating mantle
- Tubes
Risk assessment
Hazard Risk Control
Ethanoic acid Can cause eye irritation Wear eye protection, if
eyes come into contact,
flood eyes with water
and seek medical
assistance if necessary
Ethanol Flammable Wear eye protection, if
any fires occur, cover
with a fire blanket
Sulfuric acid Harmful if swallowed Keep away from mouth
and if swallowed, rinse
mouth with water and
seek medical advice
Glassware, e.g. beaker Could break and cut you Take care when handling
glassware and keep
away from edge of
surface.
If cut, wash cut with
water and ask for
medical assistance.
Method
1
, H.
BTEC L3 EXTENDED DIPLOMA IN APPLIED SCIENCE
Unit 4: Laboratory Techniques and their
Application
1) Using a measuring cylinder, measure out 25cm 3 of ethanoic acid into a pear
shaped flask.
2) Transfer 20cm3 of ethanol using the measuring cylinder and pour into the pear
shaped flask.
3) Add 5cm3 of sulfuric acid to the pear shaped flask using a pipette.
4) Place anti-bumping granules to the flask using a spatula (1/2).
5) Set up the apparatus for heating under reflux. This can be done by firstly
attaching the condenser and pear shaped flask to each clamp on the clamp
stand. Then secure with a clip to ensure the pear shaped flask is securely
attached to the condenser. Place a tube on each opening on the condenser, the
opening at the top is where the water will come out so the tube should be placed
from the opening to the sink and the opening at the bottom is where the water
will come in, therefore the tube should be placed from the opening to the tap.
Put a heating mantle directly under the pear shaped flask and connect it to a
power source- turn the setting on the heating mantle to ‘5’. Once this is done,
turn the tap on to start the reflux.
6) Heat under reflux for 30 minutes and allow to cool once finished.
Part 2
Equipment list
- Distilled water
- Separating funnel
- Stopper
- Stop clock
- Sodium carbonate
Risk assessment
Hazard Risk Control
Glassware, e.g. beaker Could break and cut you Keep away from edge of
surface
Sodium carbonate Could irritate the eyes if Wear eye protection, if it
come into contact gets in your eyes, flood
eyes with water and
seek medical advice
Hair Could get caught in Tie hair up
solution
Bung When inverting, bung Ensure that the bung is
could be loose and secure on top of the
solution could spill flask by pressing down
gently
Method
1) Add some water to a separating funnel- this is done as all of the reaction
mixture is water-soluble except for the product.
2) Carefully transfer the reaction mixture to the separating funnel.
2
BTEC L3 EXTENDED DIPLOMA IN APPLIED SCIENCE
Unit 4: Laboratory Techniques and their
Application
Assignment 4B: Explore manufacturing techniques and
testing methods for an organic liquid
Preparation of ethyl ethanoate
Part 1
Equipment list
- Measuring cylinder
- Ethanoic acid
- Pear shaped flask
- Pipette
- Sulfuric acid
- Spatula
- Anti-bumping granules
- Condenser
- Clamp stands
- Clips
- Heating mantle
- Tubes
Risk assessment
Hazard Risk Control
Ethanoic acid Can cause eye irritation Wear eye protection, if
eyes come into contact,
flood eyes with water
and seek medical
assistance if necessary
Ethanol Flammable Wear eye protection, if
any fires occur, cover
with a fire blanket
Sulfuric acid Harmful if swallowed Keep away from mouth
and if swallowed, rinse
mouth with water and
seek medical advice
Glassware, e.g. beaker Could break and cut you Take care when handling
glassware and keep
away from edge of
surface.
If cut, wash cut with
water and ask for
medical assistance.
Method
1
, H.
BTEC L3 EXTENDED DIPLOMA IN APPLIED SCIENCE
Unit 4: Laboratory Techniques and their
Application
1) Using a measuring cylinder, measure out 25cm 3 of ethanoic acid into a pear
shaped flask.
2) Transfer 20cm3 of ethanol using the measuring cylinder and pour into the pear
shaped flask.
3) Add 5cm3 of sulfuric acid to the pear shaped flask using a pipette.
4) Place anti-bumping granules to the flask using a spatula (1/2).
5) Set up the apparatus for heating under reflux. This can be done by firstly
attaching the condenser and pear shaped flask to each clamp on the clamp
stand. Then secure with a clip to ensure the pear shaped flask is securely
attached to the condenser. Place a tube on each opening on the condenser, the
opening at the top is where the water will come out so the tube should be placed
from the opening to the sink and the opening at the bottom is where the water
will come in, therefore the tube should be placed from the opening to the tap.
Put a heating mantle directly under the pear shaped flask and connect it to a
power source- turn the setting on the heating mantle to ‘5’. Once this is done,
turn the tap on to start the reflux.
6) Heat under reflux for 30 minutes and allow to cool once finished.
Part 2
Equipment list
- Distilled water
- Separating funnel
- Stopper
- Stop clock
- Sodium carbonate
Risk assessment
Hazard Risk Control
Glassware, e.g. beaker Could break and cut you Keep away from edge of
surface
Sodium carbonate Could irritate the eyes if Wear eye protection, if it
come into contact gets in your eyes, flood
eyes with water and
seek medical advice
Hair Could get caught in Tie hair up
solution
Bung When inverting, bung Ensure that the bung is
could be loose and secure on top of the
solution could spill flask by pressing down
gently
Method
1) Add some water to a separating funnel- this is done as all of the reaction
mixture is water-soluble except for the product.
2) Carefully transfer the reaction mixture to the separating funnel.
2
