Friday, 22 February 2013

Science Play - Bicarbonate of Soda & Vinegar

To show the children a chemical reaction I got out the bicarbonate of soda (baking soda) and vinegar.  I put a bit of bicarb in the messy play trays and then filled some plastic egg cups with malt vinegar.  The children added the vinegar to the bicarb and loved the fizzing sound and watching the bubbles and flow of the mixture.  I explained how the bubbles were carbon dioxide which is the same chemical we breathe out.  Here's the scientific explanation 









Food colouring could be added to the vinegar in the egg cups for dramatic effect and to show what happens when different colours are mixed.

 

4 comments:

  1. This can also be done to make raisins dance! Wish science had been fun when I was a child x

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  2. I will give that a go sometime Fran, thanks. Yes if only the science teachers at St John Fisher had introduced a bit of food colouring and dancing raisins into the syllabus we'd have those science GCSEs gosh darnit! x

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  3. There is a joke in there somewhere ;)

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