First, C separated the pennies from the other coins in our pile.
Then, R added 1/4 cup of vinegar and 1 teaspoon of salt to our container. We put five dirty pennies in the container and counted slowly to ten.
Then we placed the pennies in a bowl of water and dried them with a towel.
We also decided to remove a few pennies from the vinegar and NOT rinse them with water. Instead, we left the vinegar covered pennies on a paper towel and let them sit for a while. In time the pennies turned greenish-blue as a chemical called malachite formed on the pennies.
Who knew you could have so much fun with vinegar and a few pennies?
5 comments:
We did that awhile back and it was pretty neat to see the reaction. Abby said it hurt her fingers though.
Yeah, we also enjoyed penny cleaning here. I gave Anna an old toothbrush to rub the pennies, because I didn't want her to touch vinegar solution. She was properly wowed, but we didn't do the malachite part - it's pretty interesting too.
Someone linked this up on Science Sunday one time, and I found out you can also do this with ketchup. If I get a chance I'll see if I can find the post because it was a long list of things that would make this work, and it was really rather interesting.
I love using vinegar to clean, cheap and it cleans well. Doesn't smell so good though.
We did it with ketchup once, but the vinegar works better. I love the malachite, that's just awesome!
Beautiful!! I bet they have a bit more luck in them now that they are all nice and shiny! :-)
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