An Egg-citing Eggs-periment
Place a raw egg (including eggshell) in a glass bowl and completely cover it with vinegar; then seal it tightly with plastic wrap and put it in the refrigerator. Leave the bowl in the refrigerator for two days, making sure to add more vinegar, as necessary, to keep the egg submerged. By the second day, the eggshell will have totally disintegrated, leaving only the membrane holding it together. How? Eggshells, which are made of calcium carbonate, hate acid—the main component of vinegar.