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Electrolysis of Brine
Brine is merely sodium chloride (NaCl) dissolved in water.

If you perform electrolysis on brine you will get three substances: chlorine,
hydrogen and sodium hydroxide.

The cations move towards the cathode. So H+ and Na+ will go this way. The
hydrogen gas bubbles up and is collected…

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To test for hydrogen you first take the test tube, then seal it. Now you get a
wooden splint or match and light it. Quickly unseal the test tube and drop
the splint in. You should hear a 'pop' sound as the hydrogen combusts in a
rapidly exothermic reaction.

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The purification of copper is a form of recycling, it is a way of obtaining new,
pure copper from old pipes, wires, circuits, and so on. It uses electrolysis.


A rod of pure copper is used as a cathode and the impure copper is an anode.
The electrolyte…

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All Sodium, Potassium and
Chlorides Except silver and lead, chlorides
All Ethanoates
Except calcium, barium and lead
All Nitrates
Sodium, potassium and ammonium
All other carbonates and hydroxides are
and hydroxides

Preparation of Soluble Salts
To prepare soluble salts you must form crystals of them.…

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Extraction of Aluminium (Aluminum)

Please note that this article uses the British English spelling of aluminium,
but this is exactly the same as aluminum - this is simply the North American
English spelling.

The Ingredients
Aluminium has a very high melting point and strong bonding between
atoms, so it doesn't…

Page 6

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Some uses of aluminium are in making cars, trains, and bicycles because it is
reasonably strong but not too heavy so your aluminium bicycle won't break
and won't be too difficult to ride. Some packaging like foil and cans is also
made from aluminium - this is especially important in…


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