Written 2 years ago
by Simon
Updated a year ago
| |||
| Science | ten minutes | ||
| 4-10 years | indoor | ||
| easy | everyday objects | ||
| kindergarten, chemistry, bottle, balloon, vinegar, baking powder | |||
Pour the baking powder into the empty bottle. It's easier using the funnel.
Take the balloon and fill half of it with vinegar. Again, use the funnel.
Now put the balloon over the bottle top. Let the vinegar filled part of the balloon hang down at the bottle side, so that no vinegar gets into the bottle yet.
Now that the balloon sits tightly on the bottle top, lift the balloon and let the vinegar flow inside the bottle. Swirl the vinegar around a bit to make sure it mixes well with the baking powder.
Now the balloon will be pumped up.
So what happens here? Here comes the educational part...
The baking soda (also known as sodium bicarbonate) reacts with the vinegar (with the contained acetic acid to be exact) producing carbon dioxide (among others). The carbon dioxide (CO2) usually makes cakes to rise, but here it builds up pressure inside the bottle and pumps up the balloon.
My preschoolers do science experiments and love to watch the changes occur.. This is one experiment that they will be trying.
Thanks
Sandra, let us know what your preschoolers think about this experiment!
What other experiments do they do? Maybe you could post an article with their favorite? Would be great!
My son was so amused watching the bottle pumping up the balloon
its good.. and will try to do it as i get home. thanks
what agood idea
it really helps me a lot.....we have a project in school which is having an Investigatory project and this gave me an idea!!!!...tnx!!!!
This kind of experiments are very important because kids leaarn a lot of science projects.this one I liked it a lot.
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