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The Electrical Conduction of Silicon – a Semiconductor

In this classic demonstration, from the Royal Society of Chemistry, silicon is connected in series with a power pack and ammeter. At room temperature, a very small current flows. This can be increased by heating the silicon with a hairdryer and this can be compared with a coil of copper when the current will...

Turning ‘Red Wine’ into ‘Water’

In this classic demonstration, from the Royal Society of Chemistry, a solution of acidified potassium dichromate, which looks like red wine, is poured into beakers with small amounts of colourless solutions in. The colour changes to water, milk, raspberry milkshake and lemonade. The solutions used are barium...

Making Rayon

In this classic demonstration, from the Royal Society of Chemistry, cellulose is dissolved in a solution of tetraaminecopper (II) ions to produce a blue liquid. When the liquid is injected into sulphuric acid, polymer fibres of rayon are produced.

The resource provides a list of apparatus and chemicals...

The Lead-acid Accumulator

In this classic demonstration, from the Royal Society of Chemistry, lead electrodes are placed in a solution of sulphuric acid and connected to a power pack. After charging, the power pack is replaced by a bulb which will light up for a short time.

The resource provides a list of apparatus and chemicals...

Making Polysulphide Rubber

In this classic demonstration, from the Royal Society of Chemistry, sulphur is dissolved in hot sodium hydroxide and the solution is reacted with 1,2-dichloroethane. The condensation polymer polysulphide rubber is formed.

The resource provides a list of apparatus and chemicals needed for the experiment,...

Light Sensitive Silver Salts

In this classic demonstration, from the Royal Society of Chemistry, a precipitate of silver chloride made from the reaction of silver nitrate and sodium chloride is collected on a filter paper and dried. The paper is then placed under a photoflood light with parts of the paper obscured by object. The silver salt...

The Oxidation of Ammonia

In this classic demonstration, from the Royal Society of Chemistry, oxygen gas is bubbled through a solution of aqueous ammonia and a heated spiral of platinum is held in the resulting gas mixture. An exothermic reaction causes the wire to glow red hot and brown nitrogen dioxide is observed as well as white fumes...

The Habitable Zone

In this activity developed by the Institute of Physics, students investigate how temperature changes with distance from a heat source and relate this to planetary temperatures. After completing this activity, students should be able to:

*Understand that the temperature of a planet depends on its distance...

Blue Glow

In this demonstration, a colourless liquid and a blue liquid when mixed together emit a blue chemiluminescent glow. Light sticks are devices that produce a 'coolight' by means of a similar chemical reaction.

Cannon Fire

This demonstration shows the oxidisation of hydrogen peroxide using ethanol and potassium permanganate. An exciting illustration of energy changes, the sound of these substances reacting with each other sounds like cannon fire.

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