Wednesday, September 14, 2011

Elephant Toothpaste

I show you this experiment with a bit of a warning. If you choose to do it, be sure to have enough supplies on hand to do it again. If you choose not to have enough supplies on hand to do it twice, your kid will be severely disappointed and pester you until you get more.  Don't say I didn't warn you. (Yes, this is a home school blog and I just used a double negative.)

It's a really fun experiment that exhibits this week's science fact, particularly exothermal reactions.
Start with an empty water bottle, add a big squeeze of dish soap, a few lot drops of food coloring (we should have used more color).  Then pour 1/2 cup or so of hydrogen peroxide.
In a smaller container mix about 1teaspoon or more yeast to about 2 tablespoons of water.  Then pour the water/yeast into the hydrogen peroxide.
Observe.  Kid is saying, "cool!!!"

Oh yeah baby.  Mom is scoring points.
all you need now is an elephant - to brush its teeth.
He was happy until he realized we were out of peroxide.  Boo.  At this point be sure to feel the bottle.  It is warm.  Exothermal reactions at work.

Related and a couple of fun videos within - It's a Boy's Life: Chemistry and Lines.  This video in particular is worth watching.


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