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Electrolytic Cell

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Question

Give the electrode reactions for formation of lead metal and bromine vapours from molten $P b B r_{2}$ using inert electrodes.

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Solution

At anode:
$P b \to P b^{2 +} + 2 e^{-}$
At cathode:
$B r_{2} + 2 e^{-} \to 2 B r^{-}$ and these ions form $P b B r_{2}$ .

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