The surface tension of liquids

We observe whether a razor blade can float on the surface of different liquids.

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Model volcano

The reaction of baking soda and vinegar tinted with red food colouring resembles a volcanic...

Aluminium smelting

Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.

Lead-acid battery

Electrochemical processes in a lead-acid battery produce electric current.

Shelling eggs

The acid in vinegar dissolves materials containing calcium carbonate like eggshell and snail shell.

Polymerisation of ethene

Polymerised ethylene is known as polyethylene, a type of plastic.

Like dissolves like

Non-polar substances dissolve in non-polar solvents while polar substances dissolve in polar...

Exothermic reaction (observation)

When heated, powdered sulphur reacts with powdered zinc, releasing heat.

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