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Bowlee ParkCommunity Primary School

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(Ideal for children from Year 3 upwards.)


You will need:

-10 ml of washing up liquid

- cold water

-400 ml of white vinegar

-empty 2 litre bottle

-1/2 a cup of baking soda

-some food colouring of you have it


What to do:

Do this outside as it can get messy!

1. Mix the vinegar, 100ml of water, dish soap and 2 drops of food colouring into the empty bottle.

2. To make the baking soda slurry fill a cup about ½ with baking soda, then fill the rest of the way with water. 

3. Use a spoon to mix the baking soda and water until it is all a liquid.

4. Now it is eruption time! … Pour the baking soda mixture into the bottle quickly and step back! The science bit: A chemical reaction takes place between the baking soda and the vinegar. When they mix, it produces a gas called carbon dioxide. There is not enough room for the gas in the bottle so it will shoot out of the top. 

Additional task: Change the amount of vinegar or baking soda and see if the eruption is altered in any way.