Baking soda experiments are always very popular with my children, it’s such a fun reaction and can be used in lots of creative ways.
We’ve made baking soda ice before, but this time I added a little twist by making the ice Easter egg shaped. We also made some without the baking soda and hid a toy lizard, which the girls had to ‘rescue’.
What you need
Egg shaped mould
Add some food colouring to water and pour into moulds.
Add about a tablespoon of baking soda to the ones you want to be fizzy.
Add a toy if you wish.
We played with the ice eggs first. I asked the girls how they thought they could ‘rescue’ the lizard. First they tried to hack away at the ice using a spoon, when this didn’t work they wanted to put it somewhere warm. I suggested pouring warm water over the top instead.
Once the lizard had been set free, we poured some vinegar over the baking soda eggs, which fizzed brilliantly.
This is such a fun and easy experiment, a great introduction to chemical reactions.
The Science bit
Vinegar (an acid ) and bicarbonate of soda ( an alkali ) react together to neutralise each other. This reaction releases carbon dioxide a gas which is the bubbles you see.
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Last Updated on April 5, 2016 by Emma Vanstone