Edible science activity

Today the year five children have made home-made sherbert.  This is a really simple recipe, which could go horribly wrong.

DSCF2127 Evie warned Elise not to add too much citric acid!

DSCF2132 Imogen demonstrates the taste when too much bicarbonate of soda is added.

We tried several variations, some were rather unpleasant.  The year six children and Mrs Webb were brave enough to try our sherbert as well.

The science of what makes sherbet fizz…

When the citric acid and bicarbonate mix together with the saliva in the mouth it releases a gas, which causes a fizzy chemical reaction.  A similar fizzy reaction can be achieved with just the use of citric acid and saliva. The icing sugar sweetens the mixture.

We used:

  • Soft icing sugar
  • Citric acid for baking
  • Bicarbonate of soda
  • Jelly crystals (optional)

We considered how we could improve our sherbert further.  If you wish for your sherbet to be flavoured you might choose to add 2 teaspoons of jelly crystals. Another fun addition might be to include some popping candy or 100s & 1000s.

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You could follow Lucy’s instructions to make your own sherbert.  Try adding some jelly crystals for extra flavour and colour.


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