Listing all results (135)
This demonstration shows how a mixture of hydrogen and air becomes explosive.
The initial pop is probably caused by a small portion of the hydrogen leaking out, mixing with the air immediately above the hole and forming a minute combustible mixture.
As more hydrogen escapes through the top hole, it...
This demonstration illustrates the explosive nature of gas/air mixtures. The gas used in laboratory Bunsen burners (methane) normally burns with a blue or yellow flame. However, mixtures with air explode when the concentration of the methane is between 5 and 15%.
In this demonstration, the carbohydrate in the jelly baby is oxidised by the molten potassium chlorate(V). The jelly baby ignites and burns furiously with a high pitched roar, showing that food stuffs provide energy.
In this demonstration, a piece of paper is soaked in ethanol and water, the ethanol burns but the water prevents the paper burning. To make this demonstration very exciting, a £5 note can be used.
In this demonstration of a displacement reaction, a piece of foil in the shape of a Christmas tree is placed in lead nitrate solution. Within a few minutes the tree becomes covered with sparkling crystals of lead.