Home Science Experiments: Fizzy Balloon

Another home science experiment for kids using baking soda and vinegar is to create a chemical reaction and use it to blow up a balloon when carbon dioxide gas develops by mixing an acid and a base.

What you’ll need:

  • Any size plastic bottle
  • A funnel (we made a paper funnel)
  • Vinegar
  • Baking Soda
  • A balloon
  • Eye protection

How to do it:

  1. The amount of vinegar you will need to use will depend on the size of your bottle. Fill it to about a third of it with vinegar.
  2. If you have funnel, fill the bulb of your balloon with about a tablespoon of baking soda.
  3. Wrap the balloon’s opening around the tip of the bottle and ask your child to guess what would happen next when you mix the baking soda into the vinegar.
  4. Shake the baking soda into the bottle and watch the balloon inflate.

The science behind the experiment:

Mixing a base like baking soda (sodium bicarbonate) with an acid like vinegar (acetic acid), creates a chemcal reaction. This creates a gas called carbon dioxide which is what inflates the balloon.

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