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Description

A science experiment that shows children how chemical reactions work. When you mix yeast into hydrogen peroxide the hydrogen peroxide breaks down rapidly into a large amount of oxygen and water this causes the mixture to expand and explode out the bottle the washing up liquid turns it into a foam by trapping the oxygen bubbles

Resources

125ml 3% hydrogen peroxide
A squirt of washing-up liquid
A few drops of gel food colouring
2 tbsp warm water
1 tsp fast-action yeast
500ml plastic bottle
Bin bags to cover floor
Safety goggles if required

Instructions

Put a clean and dry empty 500ml plastic bottle in a non-reactive dish/ on top of bin bag.

Put a funnel in the top of bottle and carefully pour in the hydrogen peroxide (this needs to be done by an adult).

Remove the funnel straight into a sink or bowl, being careful not to drip any hydrogen peroxide that may still be in it.

Add a squirt of washing-up liquid to the bottle.

Add a few drops of food colouring to the bottle, then gently shake the bottle to mix all the ingredients together, making sure to keep it upright.

Stir the yeast and warm water together in a small jug.

When you’re ready to do the experiment, pour the yeast mixture into the bottle and move away quickly. The two mixtures will react together and burst out of the bottle. Wash the foam down the sink/ throw in bin bag and dispose of safely after the experiment.

Tags

• experiement
• science
• science badge
• science experiment

Badge Links

• Scientist - Other