Sunday, January 18, 2015

Science-y: A Good Use for a Bad Egg


Bad Eggs Float. Good Eggs Don't. Remember it.
One way to tell if your egg is bad is to put it into water. Good eggs will lay on their side. Slightly older eggs will stand on end. Bad eggs float. Why? Bacteria-produced gas.

The bad way to find out that an egg is bad is to crack it into your other ingredients and have a super runny yolk and whites spew into your mixing bowl or skillet. The worst way is if it's gone all Hydrogen Sulfide funky. Rotten egg smell is bad times, as we all know.

Save the waste and danger of food poisoning and put a questionable egg into a bowl of water. Don't waste the water either. Surely you have some thirsty plants that can use it.

What about that bad egg? Well, why not teach your child(ren) about the effect of acid on the calcium carbonate crystals that make up egg shells? Fun, right? Right. It's called the Naked Egg.

As you can see in the series of photos below, all you'll need is some distilled white vinegar, a jar, an egg, and a little time.  The whole process took a few days. Make sure that you leave the lid loose so that gasses can escape (without smashing the glass), and use an egg that isn't too far gone or you'll have regrets if it breaks. Big. Regrets. This will also be important because you'll need to (carefully) change out the vinegar after the first 24 hours. You can, of course, use a good egg too, but why waste it?

The Wee Wonder will be taking our experiment to school for a share. Carefully. ;)

It doesn't take long for the vinegar to go to work.

The dissolved shell floats above the vinegar.

Bloodshot Eye?

The Un-Shelling!

The egg floats ... and bloats.

3 days in. There's not much shell remaining.

The bloated egg sinks.