1. Egg Osmosis Investigation
AP Biology

2. We are seeking an answer to the question:
“How will a cell behave when placed in different types of solutions?”

3. Day 1: Set Up Your Data Table
Create the following data table in your BILL:
Date
Qualitative Observations
Quantitative Data
Prediction/Claim
Date goes here
Photos and descriptions here
Numerical data here
You will have four observations to make so make your data table accordingly.

4. Day 1: Setup
Your teacher will mass an egg and place it in a cup filled with vinegar.
Predict what you think will happen to the egg as it sits in the vinegar for the next 4 days. Use the terms hypertonic and hypotonic to describe the solutions involved.
Vinegar is 95% water
An egg is 90% water

5. Day 4: Second Observations
Your teacher will pour off the vinegar and measure the mass of the egg.
Record the mass and other observations in your data table.
State a claim about the condition of the egg after it has soaked in vinegar. Use the terms hypertonic and hypotonic to describe the solutions involved.

6. Day 4: Second Observations
Your teacher will pour corn syrup over the egg to cover it.
Predict what you think will happen to the egg after it sits in the corn syrup for 2 days.
Corn syrup is about 25% water.

7. Day 6: Third Observations
Your teacher will pour off the corn syrup into the sink.
Your teacher will measure the mass of the egg.
Record the mass and other observations about your egg and the soaking solution in your data table.
State a claim about the condition of the egg after it has soaked in corn syrup. Use the terms hypertonic and hypotonic when writing your claim.

8. Day 6: Third Observations
Your teacher will now pour distilled water over the egg to cover it. Distilled water is 100% water.
Predict what you think will happen to the egg after it has soaked in the distilled water. Use the terms hypertonic and hypotonic when writing your claim.

9. Day 10: Last Observations
Carefully pour off the distilled water into the sink.
Make observations about the solution you pour out of the cup.
Using a spoon, gently transfer your egg into a weigh tray so that you can measure the mass of your egg.
Record the mass and other observations about your egg and the soaking solution in your data table.
State a claim about the condition of the egg after it has soaked in distilled water.
Dispose of your egg and cup as directed by your teacher.