Sunday, March 10, 2013
While we were cooking eggs, the Hawk said he needed a glass of vinegar and proceeded to put an egg in it. He'd seen this experiment on Backyard Science and wanted to recreate it himself. The acid in the vinegar (acetic acid) reacts with the calcium carbonate in the egg shell, releasing carbon dioxide and making the shell soft once the carbon is gone.
The Firecat was not to be left out of course, so we had two eggs bubbling away in the vinegar.
After a day, Hawk gave bouncing the soft egg a try like he had seen on Backyard Science, so far so good.
But they discovered the soft egg didn't bounce so well from a higher drop! This did not go down well with the Firecat! Apparently you can get the eggshell to return to normal if you leave it out in the air (it takes in carbon from the air) or you can get it to explode by putting it in water. Our eggs didn't last long enough to try either of those! There was some consolation in this heart shaped yolk though!
Posted by Mel at 8:11 PM