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Irreversible Changes

We begun our work on irreversible changes by exploring what happened when we mixed different ingredients together.  We were excited by the chemical reaction we created when mixing citric acid, bicarbonate of soda and water together.  It fizzed and frothed and we explored how this change was irreversible.

We then worked in our groups to use icing sugar, citric acid and bicarbonate of soda to try and create the perfect tasting sherbet.  It took quite a bit of development (and taste testing), but some groups managed perfect tasting sherbet in the end!

Picture 1 Mixing our ingredients together
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Picture 16 Our chemical reactions fizzed and frothed.
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Picture 21 Listen to the fizz!
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Picture 25 Taste test!
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Picture 29 Too tangy!!
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Picture 31 I'm not sure about that!
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Picture 38 Just right-perfect sherbet!
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Picture 42 Mr Holmes performs a taste test!
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Investigating the best type of vinegar to create the largest chemical we knew we could only change one variable (the type of vinegar), we knew we had to keep lots of variables the same so that our test was fair.


Still image for this video