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Elephant toothpaste – Chemical reaction

The elephant toothpaste is a wonderful chemical reaction with stuff you most likely already have at home.

Elephant toothpaste - Chemical reaction

Materials

  • 1/2 cup of hydrogen peroxide (3%)
  • A container (you can use a flask, an empty bottle …)
  • Liquid dish soap
  • food colouring
  • A packet of yeast
  • Warm water
  • Potassium iodide

Procedure

Start by adding the 1/2 cup of hydrogen peroxide to the container, and then add a small quantity of dish soap followed by few drops of food colouring for a cooler and colourful effect. Dissolve the packet of yeast in a small quantity of warm water, and dissolve the potassium iodide in water.

Comparison between yeast and potassium iodide

Two reactions will be done, the yeast will be used in the reaction 1 and the potassium iodide will be used in the reaction 2.

Elephant toothpaste - Chemical reaction

The two reactions give a lovely display of foam, and it comes out of the container. But the reaction 1 is faster than the reaction 2.

Comparison between Hydrogen peroxide 3% and hydrogen peroxide 35%

The reaction 2 is compared between a third reaction (reaction 3) which were done using 35% hydrogen peroxide. 35% hydrogen peroxide is very strong and it should be used under the supervision of an adult because it can burn the skin.

Elephant toothpaste - Chemical reaction

The effect is better and cooler with the stronger hydrogen peroxide, you will obtain a lovely display of foaming.

It is important to know that the 35% hydrogen peroxide gives the amazing effect only with the potassium iodide, it does not really work with the yeast.