Use the funnel to pour 2 teaspoons of baking soda into an empty balloon. Rinse and dry the funnel.
Use the funnel to pour ¼ cup of vinegar into the bottle.
Stretch the mouth of the balloon around the bottle top.
Lift the balloon, letting the baking soda pour into the bottle. Watch what happens!
When you combined the solid (baking soda) and the liquid (vinegar), the chemical reaction created a gas called carbon dioxide. Carbon dioxide is invisible, except as the bubbles of gas you may have noticed when the vinegar and baking soda mixture began to fizz. This gas is what made the balloon inflate.
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