Friday, June 15, 2012

Fizzy Exploding Bags - Science Experiment

I found this science experiment on pinterest a few months ago.  It is super easy to do and we tried it last night.
What you need:
One small (sandwich size) zip-lock bag - freezer bags work best.
Baking soda
Warm water
A tissue

Place 1/4 cup of warm water and 1/2 cup of vinegar into the bag.
Put 3 teaspoons of baking soda into the middle of the tissue.

Wrap the the baking soda up in the tissue by folding the tissue around it.

You will have to work fast now - partially zip the bag closed but leave enough space to add the baking soda packet. Put the tissue with the baking soda into the bag and quickly zip the bag completely closed.

Put the bag on the ground and step back. The bag will start to expand, and expand, and if all goes well, it will pop.  The first one we tried was slow, so I gave the second one a quick shake and then tossed into the street.  It worked a lot faster and it was more exciting than the first one.           

This is what Science Bob said is happening inside the bag:
"What happens inside the bag is actually pretty interesting - the baking soda and the vinegar eventually mix (the tissue buys you some time to zip the bag shut) When they do mix, you create an ACID-BASE reaction and the two chemicals work together to create a gas, (carbon dioxide - the stuff we breathe out) well it turns out gasses need a lot of room and the carbon dioxide starts to fill the bag, and keeps filling the bag until the bag can no longer hold it any more and, POP! Be sure to clean up the mess."
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