Wednesday, July 21, 2010

Making a Volcano - Chemical Reactions

Today we looked at the reaction that occurred between the ingredients 
baking soda and vinegar when we combined them
to make a volcano in our classroom.

Into the volcano (a narrow jar with sand around it) we put:
1/4 cup of water
1/4 cup of Baking Soda
3 Tablespoons of dish-washing liquid
2 drops of red food colouring...
and then we added
1/4 cup of Vinegar
and watched what happened.

We noticed that when the vinegar (liquid) reacted with the
baking soda (solid) it created a gas (the bubbles in the lava).

Photographer - Ethan


Melville Int. Room 8 said...

Miss White, love the article and the photographs. We also did this last year and also did the same reaction but contained it within an old film canister plastic case (the kind that you use for numeracy activities!) if you get the lid on quick enough it should 'blow' up and hit the roof! The only problem is you sometimes get the vinegar and baking soda on the students or dripping off the roof!
Mr Webb and Room 8,Melville Intermediate School, Hamilton, Waikato.

Miss White said...

Thanks. We might try that and see if we can get a real explosive reaction happening. Did you close the lid of the canister on tightly? I've been experimenting over the weekend with one my kids told me about - a tube of mentos and a 2L coke. That one's quite a fun one to do!

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