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Balloon
Materials:
- Plastic bottle of water (empty)
- 1 cup of baking soda
- 1 cup of vinegar
- 1 Balloon
Directions:
Add the baking soda to the empty bottle, then pour in the vinegar and quickly place the balloon over the bottle opening. Watch as the balloon inflates.
Why is this happening?
When vinegar (an acid) reacts with baking soda (a base), it creates water, sodium acetate (a salt), and carbon dioxide gas (CO2). The CO2 fills the balloon, causing it to inflate.
Note:
Quickly place the balloon over the bottle to capture all the CO2 and inflate the balloon.