The Naked Egg Experiment and Procedure PDF

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Summary

A practical at home experiment which exhibits an acid-base reaction. Most of the materials are readily available at home and is easy to conduct....

Description

The Naked Egg Experiment

In this activity, students describe the effects of an acid on an eggshell. The reaction of the eggshell in vinegar is an acid-base reaction. When you submerge an egg in vinegar, the shell dissolves, leaving the inner semi-permeable membrane intact. Vinegar (acid) breaks apart the solid calcium carbonate crystals (base) in the eggshell into their calcium and carbonate parts. The calcium ions stay dissolved in the vinegar (calcium ions are atoms that are missing electrons), while the carbonate goes on to make carbon dioxide — the bubbles that you see. The acidic vinegar leaves the membrane that lines the inside of the shell intact. Some of the vinegar permeates the membrane due to osmosis, which is why the egg swells. If you shake the egg, you can see the yolk sloshing around in the white. If the membrane tears, the contents will spill out just the same as with any raw egg, only now they have been "pickled" in the vinegar.

Materials: 1. 2. 3. 4. 5. 6. 7. 8.

Raw Egg Vinegar Tap Water Cola Lemon Juice (you can also use lemonsito) Bowls/Containers (wider and deeper than the egg) Large Spoon Flexible Measuring Tape

Procedure PART A: 1. Measure the circumference of the middle portion of the egg. (Take a clear picture of you measuring the circumference of the egg)

2. Place the egg in a container. This container should be wider and deeper than the egg. 3. Cover the egg with vinegar and store in a safe place. You should see bubbles forming at the surface of the shell. (Take a clear picture of this phenomenon. Also, take a picture of you with the specimen) 4. The next day, use a big spoon to scoop the egg out of the vinegar 5. Discard the old vinegar 6. Cover the egg with fresh vinegar and store in a safe place (Take a clear picture of the specimen, Also, take a picture of you with the specimen) 7. Every morning, check on the state of the egg without taking it out of the jar for 4 days. (Experiment ends on Monday) You only need to replace the vinegar after the first day. (Take a clear picture of the specimen as well as a picture of you with the specimen every single day) 8. After a few days, the egg should be translucent but still pretty much egg-shaped 9. Measure the circumference of the middle portion of the egg. (Take a clear picture of you measuring the circumference of the egg) 10. Do not break the egg, we will use it for another experiment!

Repeat the same experiment but replace the vinegar with: PART B) Plain Water PART C) Cola (You can use coca cola) PART D) Lemon Juice (You can use lemonsito)...