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Exploring Osmosis with Naked Eggs
Oct 7, 2024
Sci Guys: Osmosis and Naked Eggs
Introduction
Hosts: Adam and Ryan
Experiment: Exploring osmosis through creating naked eggs
Key Concept: Osmosis - movement of water across a membrane from a dilute to a concentrated solution
Materials Needed
Ingredients:
Egg
Vinegar
Corn syrup
Food coloring
Equipment:
Glass
Old spoon or gravy ladle
Safety Precautions
Wear a lab coat or apron
Use goggles to prevent spills and splashes
Experimental Steps
Step 1: Removing the Egg Shell
Place the egg at the bottom of a glass.
Pour vinegar over the egg.
Let the egg sit in vinegar for 24 hours. The vinegar dissolves the shell and exposes the membrane.
After 24 hours, refresh the vinegar for another 24 hours to fully dissolve the shell.
After the shell is gone, rinse the egg.
Step 2: Osmosis with Corn Syrup
Place the naked egg in a glass.
Pour corn syrup over it.
Submerge the egg with a bent spoon.
Let it sit for 24-48 hours. The egg will shrink as water moves into the syrup.
Afterward, rinse the egg.
Step 3: Osmosis with Colored Water
Fill a glass with water, add food coloring, and stir.
Place the shriveled egg in the colored water.
Let it sit for 24 hours. Water will move back into the egg, causing it to swell.
Rinse the egg after completing the process.
Explanation of the Science
Vinegar Reaction:
Vinegar (acetic acid) reacts with the egg shell (calcium carbonate) to produce carbon dioxide, water, and calcium acetate.
Osmosis Process:
Egg membrane is semi-permeable, allowing only water molecules to pass.
Water moves from areas of low solute concentration to areas of high solute concentration.
Vinegar Bath:
Water enters egg, causing it to swell.
Corn Syrup Bath:
Water leaves egg, causing it to shrink.
Colored Water Bath:
Water re-enters egg, causing it to swell again.
Conclusion
Osmosis demonstrated through the movement of water across the egg membrane.
Final Notes
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Full transcript