Egg Osmosis Lab
Osmosis is the movement of water across the plasma membrane in which the solvent
moves from an area of high concentration to an area of low concentration.
For each solution below, use the diagram of the naked eggs in solution to identify the
movement of water. Use the results (data) of the egg osmosis lab to help guide you.
Water Solution:
1. Draw arrows to show the water movement in or out of the egg.
2. Did the cell shrink, swell, or stay the same?
3. There is a greater concentration
of H2O where? (circle one)
A. Inside the egg
B. Outside the egg
C. The concentration is the same
4. This shows the cell in a: Hyper/Hypo/Isotonic solution.
Corn Syrup Solution:
1. Draw arrows to show the water movement in or out of the egg.
2. Did the cell shrink, swell, or stay the same?
3. There is a greater concentration
of H2O where? (circle one)
A. Inside the egg
B. Outside the egg
C. The concentration is the same
4. This shows the cell in a: Hyper/Hypo/Isotonic solution.
Analysis Questions:
1. Complete the Bar Graph below by drawing in a bar of the percent change for each
solution.
Mass (g)
Water before/after
Syrup before/after
2. How did the results compare to your pre-lab predictions?
(use the chart above )
3. Which of the solutions was hypertonic? What is your evidence?
(use the chart above)
4. Which of the solutions was hypotonic? What is your evidence?
(use the chart above)
5. Which of the solutions was isotonic? What is your evidence?
(use the chart above)
6. What is special about the cell membrane that allows only certain
materials to pass through?