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Lab: Cell Membrane

Problem: How will the process of osmosis affect the condition of a cell when the cell is submerged in a hypertonic solution?

How will the process of osmosis affect the condition of a cell when the cell is submerged in a hypotonic solution?

How will the process of osmosis affect the condition of a cell when the cell is submerged in an isotonic solution?

Research: (for this part, do your own research on the problems and watch this online video, while answering these questions, then write what you have learned about the problems) Download the video by right clicking on the link and then selecting: save target as

Hypothesis: (complete this after you have done your research)

Pre-lab Preparation: Before experiment can begin the shell of the egg must be removed. This is done with the following step

1. Obtain beaker(250/400ml), mark the beaker to identify which group it belongs to.

2. Fill the beaker with 100mL to 150 ml of vinegar.

3. Place the egg in the vinegar (carefully).

4. Let stand for two days.

Experimental Procedure:

1. Remove egg, wash off gently, do not pick at egg, it will break!

2. Dry egg, mass egg, measure length and width and record the data on the data table.

3. Make detailed observations of the egg and record on data sheet.

4. Obtain 100mL to 150mL of syrup in beaker.

5. Place egg into syrup, let stand for one day.

6. After one day, remove egg from syrup, rinse and dry.

7. Observe, mass, measure length & width- record data. (write down your observations)

8. Obtain 100mL to 150mL of distilled water in beaker.

9. Add two drops of food coloring to the distilled water.

10. Place egg in distilled water & food coloring, let stand for one day.

11. After one day, remove egg from distilled water, rinse and dry.

12. Observe, mass, measure length & width- record data. (write down your observations)

13. Dispose of egg in trash & clean all lab equipment.

Honors biology: Include volume and density of the egg in your data collection

Data: (data tables, graphs, & written observations)

Data Analysis: (examine data, did it support or reject hypothesis? Why?)

Conclusion: (state best possible answer to the problems)