In Whio for science we have been creating chemical reactions and
one of them involved blowing up a balloon!
We used a small plastic bottle, a balloon, baking soda and white vinegar.
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First we put in 10 teaspoons of Baking Soda then we added half a small cup of Vinegar and then Mrs Thomas
quickly BUT
calmly put the balloon over the nozzle of the bottle and then we watched the Carbon-Dioxide rise up and fill the balloon!!!
The first time we did it the balloon blew up to the size of a Feijoa, but the second time we used 20 teaspoons of Baking Soda, a bit more vinegar and it blew up to the size of a Mango!!!!
The balloon felt cold because it was an
endothermic reaction. This means the materials
absorb energy from around it rather than produce energy (
exothermic).
A question we have now is; how much of each material would you need to make the whole thing blow up bigger, or even pop?
By Shannon and Leigh