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Electrolysis and Electrolytes

Why aluminium...

Question

Why aluminium bromide is a poor conductor of electricity in molten state?

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Solution

Aluminium bromide changes its structure from ionic to covalent when the solid turns to a liquid or vapour. Liquid or molten AlBr₃ which is covalent in nature does not contain free Al^{3 +} or Br^- ions to conduct electricity.

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