Science Club

S1 pupils are invited to come along to science every Wednesday lunch time at 12:45 until 1:15.

This experiment is called the ‘elephants toothpaste’ and is a popular teacher demonstration in science clubs. The process involves adding a chemical catalyst, in this case Potassium Iodide, to Hydrogen Peroxide.

The catalyst breaks down the hydrogen peroxide into water and oxygen. The Water mixes with the washing up liquid that was added which creates the foam and the rapid production of Oxygen causes the foam to be pushed out of the tube. Food colouring is added to make striped like toothpaste.