![]() “Which bottle do you think blew up the balloon the best?” I asked C. We lined up our bottles to check out the results. Half a bottle seemed to work just fine and the Mentos were a great catalyst, causing the Diet Coke release its carbon dioxide. We actually ended up doing this experiment twice because the first time we didn’t have enough soda in the bottle so it produced a pretty weak reaction. We put two Mentos in the balloon, stretched it over the mouth of the bottle, and then dumped them into the Coke. This one was definitely the noisiest! You could hear all the popping going on in the bottle as the Pop Rocks released their pressurized carbon dioxide.įor the last bottle, we filled half of it with Diet Coke again. I stretched the balloon over the mouth of the bottle and C dumped them into the Diet Coke. To prep this balloon experiment, we dumped a pack of Pop Rocks into it. We found that we got a better reaction if we opened a fresh bottle and poured out the soda we didn’t want rather than pouring soda into an empty bottle - I think it stayed better carbonated. I liked the Diet Coke because it didn’t leave a sticky mess, but any soda would work. ![]() Our third bottle was half filled with Diet Coke. Magic Balloon #3: Diet Coke and Pop Rocks The effect was instantaneous and the balloon quickly inflated as the bicarbonate baking soda reacted with the acetic acid in the vinegar making carbon dioxide. I put the balloon over the mouth of the bottle and then C dumped in the baking soda. We prepped the balloon by using the funnel to fill half of it with baking soda. ![]() In our second bottle for this balloon science experiment, we poured a couple inches of vinegar. That carbon dioxide is filling up the balloon.” Magic Balloon #2: Vinegar and Baking Soda “It’s eating the sugar that we added and when it eats the sugar, it creates a gas called carbon dioxide that makes all those bubbles. ![]() “Yeast is a type of bacteria, so it’s actually a living thing,” I explained. It only took about five minutes for the yeast to start bubbling and our balloon to start inflating! “Ew, what is it?” C asked, looking at the foam that was starting to bubble. We put the balloon over the mouth of the bottle and then let it sit in the sun. We swirled the yeast around a bit and then added the teaspoon of sugar and gave it another good swirl. In our first bottle, we poured in about an inch of warm water and then dumped in the entire packet of yeast. ![]()
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