Materials:Water bottleVinegarSmall balloonFunnelTeaspoon of baking soda
Experimental Procedure:Put the water bottlewhere it will certainly stand upappropriate securely, or have actually a companion host it. Fill it halfmeans via vinegar.Give the balloon an excellent extending, choose you would if you were around to blow it up.Use the funnel to put the baking soda inside the balloon. Gently shake the balloon until all the baking soda goes to the bottom.Making sure namong the baking soda gets right into the water bottle, very closely stretch the opening of the balloon till it’s totally over the opening of the water bottle. If it’s not a tight fit, your balloon is probably as well big and also you should usage a smaller sized one instead.Once the balloon is attached to the water bottle, lift the remainder of the balloon so that the baking soda drops right into the vinegar. You might have to provide it a gentle shake to make certain it all goes in.Watch the balloon inflate! What’s happening right here is the vinegar, an acid, is producing a chemical reactivity via the baking soda, a base. When the 2 substances mix, you get carbonic acid, which is unsecure and decomposes (drops apart) to become carbon dioxide (the gas that’s filling the balloon!) and water. Because the carbon dioxide is a lot much less dense than the stuff you provided to create it, it desires to expand, and the balloon is stretchy enough to permit it to do simply that!
Terms/Concepts: fluids, density
References: Phineas and also Ferb Science Lab, publimelted by Scholastic, Inc., pp. 12-13 (2011).
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Forfurther information, consult your state"s handbook of Science Safety.