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How to Peel a Raw Egg
Posted on 8th Mar 2011 | In General Science
Peel an uncooked egg?
Apparently not. Ali and I had scrambled eggs for dinner so I decided to do some science for kids using a hen’s egg. One fun, QUICK exercise is to peel an uncooked egg by using household vinegar. As usual I’m doing “science in seconds” (aka: science rush job) in between five hundred other things. So this better be fast.
This is my kind of science cuz let’s face it; the kid’s homework is getting out of hand. It’s crazy! So much homework and so meaningless that I’m considering becoming a HOMESCHOOLER. You see, if I was a teacher, I wouldn’t give any homework at all. This is probably why I’m not a teacher.
Jokes aside, I must say, that I’m in AWE of the families that actively take ownership of their children’s education and homeschool their kids. These families are the real heroes of Science With Me! First and foremost, Science With Me! strives to instill a love of science.
That’s why I started this whacky blog!; to remind myself that SCIENCE IS FUN!
Anyway, I’ll stop rambling. Let’s start.
To peel a raw egg.
Stuff You Will Need
One kid + Mom + Faith in science
Plastic jar with a lid
What to Do
Fill the jar with some vinegar.
Gently place the uncooked egg into the vinegar without cracking the egg. The egg must be covered completely with vinegar.
Place the lid on the jar.
Monitor what happens to the egg over the next 24 to 48 hours. (Do not shake or move the jar)
What’s the deal?
Eggshells are made of calcium carbonate and the chemical name for vinegar is acetic acid. When acetic acid (vinegar) reacts with calcium carbonate (eggshell), the eggshell gradually dissolves and carbon dioxide bubbles form. Immediately after the egg was placed into the vinegar, bubbles (carbon dioxide) formed on the surface of the egg and increased in number over time.
After 24 to 48 hours, the shell should have been removed from the egg. You may need to gently wipe the shell off the egg with a paper towel or place it under running water for a few seconds. (I did).
While delicate, the egg’s contents stays together with a very thin see-through membrane around the outside.
Apparently, the reaction is:
2 CH3 COOH + CaCO3 -> Ca (CH3 COO)2 + H20 + CO2
Will I be forgetting this formula?….you betcha! I just put it in there because it looks impressive…right?
Okkkkkkayyyyyy, let’s move swiftly on
You can peel a raw egg…Wow! Honestly, the longer I live…
This might just be my new party piece. That and tap-dancing in my bikini. (A very frightening sight indeed).
Essentially you “peel” the egg by dissolving the shell with vinegar. Ali LOVED this experiment. I let her do all the pouring of water and vinegar (she said she felt important) and then she could see the results in a very definite way.
The egg retains its oval shape and becomes a squashy, translucent, sponge-like orb…perfect for drawing a face on! (which of course is the real point of the exercise).
Please send me your EGG FACE’s using the form below. The best one will be posted on the Science With Me! website (achieve world fame) and the winner receives a Science With Me! video of their choice!
Be careful when drawing your face because the membrane is very fragile and can burst or puncture easily…
I won’t post the picture of my kitchen floor after this orb burst! Not pretty. Much kitchen roll required.
Ok, that’s science for kids scratched off the to-do list…It’s time to do the laundry.
Science With Mom!
Elva O'Sullivan Ph.D is an educator and founder of ScienceWithMe.com She has created over 50 educational science products for the marketplace. To learn more about her and ScienceWithMe!® follow her on Facebook, LinkedIn and Twitter.
WOW! Elva O'Sullivan, founder of www.sciencewithme.com has one of the top 10% most viewed LinkedIn profiles for 2012. LinkedIn now has 200 million members. View Elva's profile!
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