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AQA GCSE Chemistry Electrolysis of Key Compounds

Electrolysis of Key Compounds

This page covers the following topics:

1. Electrolysis of Sodium Chloride
2. Electrolysis of Lead (II) Bromide
3. Electrolysis of Aluminium Oxide

Remember there are different products for the electrolysis of sodium chloride depending on whether it is in aqueous or molten state, the different products have many uses such as PVC (polyvinylchloride) or hydrogen fuel cells.

Electrolysis of Sodium Chloride

The electrolysis of molten lead (II) bromide produces a metal and a halide gas.

Electrolysis of Lead (II) Bromide

Aluminium is extracted from aluminium oxide powder originating from bauxite. In this electrolysis the aluminium oxide is dissolved in aluminium cryolite and graphite electrodes are used, note the different arrangement of electrodes shown in the diagram.

Electrolysis of Aluminium Oxide

1

Suggest an industrial use for the products of electrolysis of lead (II) bromide.

Suggest an industrial use for the products of electrolysis of lead (II) bromide.

2

Is the electrolysis of aluminium oxide a molten or aqueous electrolysis?

Is the electrolysis of aluminium oxide a molten or aqueous electrolysis?

3

Write the half equation for the reaction at the cathode in the electrolysis of molten lead (II) bromide.

Write the half equation for the reaction at the cathode in the electrolysis of molten lead (II) bromide.

4

What are the products of the electrolysis of lead (II) bromide?

What are the products of the electrolysis of lead (II) bromide?

5

What factors should you consider when choosing the location of an aluminium extraction plant?

What factors should you consider when choosing the location of an aluminium extraction plant?

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