Baking Soda Bubbles

11 12 2008

We found a really cool experiment on the Zoom website! Have you ever wanted to see bubbles float in midair without popping? This experiment will allow you to do just that!

 

Materials:

– 1/4 cup of baking soda

– 1 cup of vinegar

– Bubbles (with a bubble wand included)

– A large, clear container (any plastic or glass bowl will do fine)

 

Instructions:

1. Pour 1/4 cup of baking soda in your clear container.

2. Pour 1 cup of vinegar into the same container. The mixture of the vinegar and baking soda will bubble and foam, making carbon dioxide.

3. Blow some bubbles into the container and watch as they hover over the mixture of carbon dioxide and take longer to pop than normal.

 

Here is a video of the experiment in action. Near the end of the video, you will see the experiment starting to take effect:

So how does this awesome experiment work? The carbon dioxide, which is at the bottom of the container, is more dense or heavier than the air above it. This causes the carbon dioxide to stay at the bottom.  When you blow bubbles into the container, you are filling the bubbles with air from your lungs. Because the air in the bubbles is less dense, or less heavy, than the carbon dioxide, the bubbles stay hovering above the carbon dioxide instead of reaching the bottom of the container and popping. Try this experiment at home! See how long you can get the bubbles to hover in the container without popping and tell us your results!

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One response

10 11 2009
bob

really cool! I ♥’d it!!!!!

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