Naked eggs make a fun science experiment! To make a naked egg, you use vinegar to dissolve away the outer shell of an egg. Making a naked egg requires no special science equipment, making it a great activity to do at home. It's very easy, and takes just a few minutes to start the process.
Ingredients and supplies:
- 2-3 raw eggs
- 3 cups white vinegar
- Container with lid, large enough for the eggs and vinegar
Pour the vinegar over the eggs. First, place the eggs in the container. They should not be close enough to touch each other, but they can touch the sides of the container. Then cover the eggs with the vinegar. You don't need to measure the vinegar exactly; enough to completely cover the eggs is fine. Then place the lid on the container.
Refrigerate these eggs. Carefully set the container in the refrigerator, and leave it alone for 24 hours. Vinegar is an acid; it will slowly eat away the calcium carbonate of egg shells. Some of the vinegar also makes it inside the egg. If you shake the naked egg, you can see the yolk sloshing around in the egg white.
Remove from the refrigerator. Carefully remove the container from the refrigerator. You may notice small bubbles of carbon dioxide on the outside of each egg as the vinegar eats away at the shells. Now, remove each egg from the container with a spoon. Be careful, because the shells should be nearly dissolved by this point. The egg should be translucent without the shell. If any of the eggs are oozing, the membranes have broken. You should throw these out.
Replace the vinegar. Pour out the old vinegar, place the eggs back in the container, and cover with new vinegar. Place the lid on the container, and refrigerate for another 24 hours.
Take the eggs out of the refrigerator. This time, when you remove the container from the refrigerator and take out your eggs, they should be completely done. There will be no shell left on the eggs. You can give it a gentle squeeze to see the flexible outer membrane, but do not squeeze hard enough to break this membrane. This membrane is what is holding the egg together once the shell is gone. Unlike hard-boiled egg, the inside of a naked egg is not solid. If you leave the egg in the vinegar for longer, the outside will become even more rubbery. You can even leave it in the vinegar for a week or longer.
Naked eggs are not edible, but they make a fun science experiment. Once you are done with the egg, do not try to cook it or eat it, just discard it.