Materials:Water bottleVinegarSmall balloonFunnelTeaspoon the baking soda
Experimental Procedure:Put the water bottlewhere it will certainly stand upright securely, or have a partner hold it. To fill it halfway with vinegar.Give the balloon a an excellent stretching, like you would if girlfriend were around to punch it up.Use the funnel to placed the baking soda inside the balloon. Gently shake the balloon till all the baking soda goes to the bottom.Making sure none that the baking soda gets right into the water bottle, carefully stretch the opened of the balloon till it’s completely over the opening of the water bottle. If it’s no a tight fit, your balloon is probably too big and you should use a smaller one instead.Once the balloon is attached come the water bottle, elevator the rest of the balloon so the the baking soda falls into the vinegar. You can have to provide it a tenderness shake to make certain it all goes in.Watch the balloon inflate! What’s happening here is the vinegar, one acid, is developing a chemistry reaction through the baking soda, a base. Once the 2 substances mix, you obtain carbonic acid, i beg your pardon is unstable and decomposes (falls apart) to become carbon dioxide (the gas that’s filling the balloon!) and water. Because the carbon dioxide is much less dense than the ingredient you offered to create it, it desires to expand, and the balloon is stretchy enough to allow it come do just that!
Terms/Concepts: fluids, density
References: Phineas and also Ferb science Lab, released by Scholastic, Inc., pp. 12-13 (2011).
You are watching: Self inflatable balloons
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Forfurther information, consult your state"s handbook of science Safety.