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SQA National 5 Chemistry Electrolysis of Key Compounds

Electrolysis of Key Compounds

This page covers the following topics:

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

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What is the half equation of the reaction at the cathode in molten sodium chloride electrolysis?

SQA National 5 Chemistry Electrolysis of Key Compounds What is the half equation of the reaction at the cathode in molten sodium chloride electrolysis?
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Write the half equation for the reaction at the anode in the electrolysis of molten lead (II) bromide.

SQA National 5 Chemistry Electrolysis of Key Compounds Write the half equation for the reaction at the anode in the electrolysis of molten lead (II) bromide.
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What is the advantage of dissolving aluminium oxide in aluminium cryolite?

SQA National 5 Chemistry Electrolysis of Key Compounds What is the advantage of dissolving aluminium oxide in aluminium cryolite?
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4

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What is the half equation for the reaction at the anode in the electrolysis of aluminium oxide?

SQA National 5 Chemistry Electrolysis of Key Compounds What is the half equation for the reaction at the anode in the electrolysis of aluminium oxide?
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