EGG
OSMOMETER
EXPERIMENT
Name: Syarifah Alyah
Maisarah Binti Syed
Mohd Hatta
Class: 4 Budi
Date And Time: 2/6/2023
9.33 PM
CONTENT
1. Credits
2. Introduction &
Objective
3. List Of Apparatus
And Material
4. Procedure
5. Conclusion
6. Discussion
7. Results
8. Cost Estimation
INTRODUCTION AND
OBJECTIVE
Introduction:
Egg membrane is semipermeable, therefore it can
be a subtitute for visking
tube.
Objective:
Understanding the movement
of substances across plasma
membrane
CREDIT
First, I would like to thank the
principal of Sekolah Sains Sultan Haji
Ahmad Shah Pekan, Puan Narizan binti
Mamat for allowing me to conduct
experiments related to the egg
osmometer.
Furthermore, I would also like to
thank Puan Nur Aziemah for helping
and guiding me in this experiment.
Lastly, I appreciate all the support
from my friends and family
throughout the egg osmometer
experiment.
List Of Apparatus And
Material
Apparatus: 1. Glass jar
2. Hot glue gun
Materials: 1. Fresh egg
2. Drinking straw
3. RO water (sea master)
PROCEDURE
1. Crack the eggshell at one end
with a blunt object without
damaging the underlying shell
membrane. Remove the shell
fragment without tearing the
membrane
2. At the other end of the egg,
remove a small portion of the shell
and puncture a tiny hole in the
membrane.
3. Insert a plastic drinking straw into
the hole. Seal it using a hot glue gun
to make sure the seal does not leak.
4. Set the exposed membrane of the
egg in a glass jar of RO water. Add
water from time to time as needed
to ensure that the water covers the
membrane all the time.
5. Check the osmometer every hour
over the next 12 hours. Each time you
check it, record the time and
measure the height of the fluid in
the drinking straw.
6. Draw a graph to represent the
data you have recorded.
Conclusion
Water molecules permeate from an area of high
water potential to an area of lower water
potential.
DISCUSSION
1. Based on the graph, describe the relationship
between the egg solution level and time
The final level of the egg solution increases when the
time increases. This is due to the diffusion of water
across the selectively permeable membrane ( egg
membrane) into the egg solution inside the egg. The
diffusion of water is osmosis.
2. What causes the change in the level of the solution
in the straw?
The level of egg solution increase because of the
movement of water molecules from inside the glass
jar into the egg which is down the concentration
gradient.
3. What inferences can you make about the size of
water molecules and the pores of the egg membrane?
The size of water molecules is smaller than the size
of pores of the egg membrane.
DISCUSSION
4. Predict the result if mineral water is replaced with
30% NaCl salt solution? Explain.
The level of egg solution in the straw decreases. This
is because the egg solution diffuses out of the egg
into the salt solution inside the glass jar down its
concentration gradient.
Result
Cost Estimation
1. Fresh egg - RM 0.51 x 5
2. Glass jar - RM 1.70
3. Drinking straw - RM 2.30
(one pack)