A "Pop" Bottle
Needed:
- A bottle with a cork
- Water
- Vinegar
- Baking soda
- Tissue paper
- A pan or sink to catch the
overflow
Experiment:
Put water and vinegar into the bottle. Roll a little baking
soda in tissue paper and drop the paper into the bottle. Immediately
place the cork on the bottle. Wait and observe as the cork shoots
off the top of the bottle!
Explanation:
When the vinegar (an acid) and the baking soda (a base)
are mixed, they combine chemically to produce carbon dioxide
gas. As the gas forms, the pressure builds until it pops
the cork off the bottle. If you can not find a cork, try
this without the cork; the water and bubbles will overflow.
Do not use a screw-top bottle. Experiment with different
amounts of water, vinegar, baking soda, and tissue. Notice
how the rate of carbon dioxide gas production varies.
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