GRAND RAPIDS, Mich. — A force other than your lungs will blow up your balloons this fall. The power of carbon dioxide gas will have everyone intrigued.
Let's get started!
- Water Bottle
- Latex Balloon
- Alka-Seltzer Tablets
- Crush 2 to 4 Alka-Seltzer tablets and put them inside your balloon
- Fill the water bottle about halfway full of water
- Attach the balloon to the water bottle and let the Alka-Seltzer tablets fall into the water
- Watch as the balloon inflates
- Optional: Decorate your balloon Halloween style
When the Alka-Seltzer tablets are dropped in the water bottle, the solid tablet interacts with the liquid water to form a gas. This gas is known as carbon dioxide — you know, the bubbles you see in pop! The carbon dioxide gas is trapped inside the balloon and water bottle, causing the balloon to inflate!
Here is an idea: Can you think of another chemical reaction that would form carbon dioxide and blow up the balloon in a similar way? Hint: We covered this reaction in our first experiment.