Simple Chemical Reactions - SSERC
|Chemical Demonstrations |
|Elephant’s toothpaste |
Apparatus you will need
Spatula
100 cm3 measuring cylinder
A large basin or a sink to stand the cylinder in (this gets messy!)
Chemicals you will use
60 cm3 x 100 volume hydrogen peroxide solution (corrosive,irritant)
A bottle of food colouring
A bottle of good quality washing-up liquid
Potassium iodide (pre weighed 1.4 g)
What you will do
1. Take the cylinder, add a good squirt of washing-up liquid and a few drops of food colouring.
2. Stand it in the basin or sink.
3. Pour about 60 cm3 of the hydrogen peroxide into the measuring cylinder.
4. Using a spatula, add the potassium iodide and stand back!
Safety
Wear eye protection
Care with peroxide - Corrosive and harmful
Wear gloves
It is the responsibility of teachers doing this demonstration to carry out an appropriate risk assessment.
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This reaction can be applied to curriculum for excellence.
Through experimentation, I can identify indicators of chemical reactions having occurred ...
SCN 3-19a
…analyse experimental data on chemical reactions that result in an obvious change in energy.
SCN 4-19 a
CfE Higher: Chemistry in Society.
Equilibria
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