Listing all results (214)

The Equilibrium Between Co(H2O)6 2+ and CoCl4 2–

In this classic demonstration, from the Royal Society of Chemistry, the equilibrium between the cobalt hexaaqua ion and cobalt chloride can be disrupted by adding chloride ions and by changing the temperature. The reaction mixture changes from blue to pink.

The resource provides a list of apparatus and...

Phenolphthalein as an Indicator

In this classic demonstration, from the Royal Society of Chemistry, phenolphthalein is turned pink and colourless in alkali and acidic conditions, and then colourless in strongly alkaline conditions.

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

Strong and Weak Acids: the Common Ion Effect

In this classic demonstration, from the Royal Society of Chemistry, three different strength acids are reacted with calcium carbonate, the gas produced is captured using washing up liquid. The height and speed of the foam produced are measured as well as the pH throughout the demonstration.

The resource...

The Reaction Between Zinc and Copper Oxide

In this classic demonstration, from the Royal Society of Chemistry, copper oxide and zinc are heated together, the reaction is exothermic and the products are identified. The properties of the products are also demonstrated.

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

Catalysis of the Reaction Between Sodium Thiosulphate and Hydrogen Peroxide

In this classic demonstration, from the Royal Society of Chemistry, the reaction of hydrogen peroxide and sodium thiosulphate is observed, as the reaction progresses sulphuric acid is produced and this changes the colour of the universal indicator. A catalyst of ammonium molybdate speeds up the colour change....

The Optical Activity of Sucrose

In this classic demonstration, from the Royal Society of Chemistry, using sugar solution and polaroid sunglasses, students are able to observe the optical activity of sucrose.

The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips.

Curriculum...

A Sodium Ethanoate Stalagmite

In this classic demonstration, from the Royal Society of Chemistry, a supersaturated solution of sodium ethanoate is made addition of a few extra crystals to the solution causes it to crystallise into a stalagmite. The process is exothermic.

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

Urea-methanal Polymerisation

In this classic demonstration, from the Royal Society of Chemistry, a hard thermosetting polymer is produced by adding acid to a solution of urea in formalin. This reaction is very exothermic.

The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips....

Dalton's Law of Partial Pressures

In this classic demonstration, from the Royal Society of Chemistry, the pressure exerted by molecules of methane, hydrogen and oxygen are measured separately and as a mixture. They are shown to obey Dalton’s law.

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

The Real Reactivity of Aluminium

In this classic demonstration, from the Royal Society of Chemistry, sodium hydroxide and mercury (II) chloride solutions are used to remove the oxide coating of aluminium foil resulting in a vigorous reaction with air.

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

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