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whynotchemeng
whynotchemeng: Top Ten Flash Bang Demos
These ten videos from the Institution of Chemical Engineers, have been produced to provide fun and exciting demonstrations that are relevant to the Key Stage Four curriculum. The videos show the demonstration performed in front of a class, and show the reaction of the students to the demo.
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Frothy Foam
In this dramatic demonstration, potassium iodide catalyses the decomposition of hydrogen peroxide to oxygen and water.This is an exothermic reaction and water is produced as steam. Food colouring and washing up liquid mixed in with the hygrogen peroxide create coloured fountains of oxygen bubbles during the...
The Coke Fountain
In this demonstration from whynotchemeng, Diet Coke and Mentos mints are used to create coke fountains. The small pits on the surface of the Mentos create many nucleation sites for bubbles to form. This experiment is very messy and so it is best to perform it outside the classroom. A rolled up piece of paper can...
Vacuum Bazooka
This video from whynotchemeng shows the use of a vacuum cleaner to create a bazooka that fires film canisters. The pressure difference in the tube caused by the vacuum cleaner, makes the air outside push the canister at high speed through the tube.
Lilac Fire
This demonstration of a redox reaction. The reaction causes a lilac flame, which is best viewed in a darkened room. Mixing glycerol with potassium permanganate (VII) causes an exothermic reaction which oxidises the glycerol to from carbon dioxide and water (hence the steam) and it is itself then reduced. The...
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| Subject(s) | Science, Physics, Practical work, Demonstrations, Chemistry |
|---|---|
| Age | 14-16 |
| Published | 2010 to 2019 |
| Published by | |
| Collections | |
| Direct URL | https://www.stem.org.uk/cx5rj |
