halides of hydrogen and alkali metals yield dash ions in aqueous solution during electrolysis these ions are discharged at the negative electrode i.e. cathode
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As we have covered, electrolysis is the passage of a direct electric current through an ionic substance that is either molten or dissolved in a suitable solvent. This results in chemical reactions at the electrodes and the separation of materials. Two commonly used methods of electrolysis involve molten sodium chloride and aqueous sodium chloride. You might think that both methods would give you the same products, but this not the case. Let’s go through each of the methods to understand the different processes
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Alkali metals are obtained by electrolysis of molten salt and not aqueous solution because H2 is liberated at cathode instead of alkali metal.
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