Egg Membrane Lab
Problem: Are sugar particles and starch particles able to move through the egg
membrane?
Think about what you already know about particles….they MOVE!
Hypothesis:
__________________________________________________________________________________________
__________________________________________________________________________________________
____________________________________
Materials List:1.






Graduated cylinder (
10 ml cornstarch solution
10 ml of sugar solution
500 ml beaker
200 ml of warm water
Straight pin







Iodine solution
Benedict’s solution
One egg
Two test tubes
Test tube tongs
Two Eyedroppers
Metal Spoon
Procedure:
1. Mix 3 droppers full of starch solution and 3 droppers full of sugar solution
in a beaker containing 200ml of warm water.
Include the names for the
following labels…………
2. Crack off the top 1/3 of an egg and save the bigger end with the second
membrane.
3. Using a straight pin, carefully scratch a whole in the bottom center making
certain to puncture the shell and outer membrane but not the inner
membrane.
4. Float the egg in the beaker but be sure that it does not tip over.
5. Using an eyedropper, add 3-4 eyedroppers full of water into the top of the
egg.
6. Wait 15 min and use the eyedropper to remove ½ of the solution in the egg
and put it in a test tube. Put the other ½ of the solution remaining in the egg
into a second test tube.
7.Test the sample in one test tube for starch by adding a few drops of iodine.
8. Test the sample in the other test tube for sugar using Benedict’s Solution and heat.
This lab is complicated and tricky, especially picking through to the egg membrane. It is a good time to
think of possible errors as you completed your procedure. Remember them when you write your
conclusion.
Observations:
My observations
Explain how this might increase
your understanding of the size of
certain particles?
__________________________________________________
__________________________________________________
__________________________________________________
__________________________________________________
__________________________________________________
__________________________________________________
__________________________________________________
__________________________________________________
Did you accept or reject your hypothesis?
Why?
Conclusion: The following are some questions that might help you write your conclusion.
Did your results teach you anything about the movement of particles?
Explain how your findings relate to the BIG QUESTION.
What could have been possible errors when you did your experiment? How might these errors have changed your work?
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________