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17 December, 08:01

What substance is produced at the anode during the electrolysis of molten calcium bromide, cabr2? assume standard conditions?

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  1. 17 December, 08:29
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    Answer is: bromine.

    Molten calcium bromide is separeted::

    CaBr ₂ (l) → Ca (l) + Br₂ (l),

    but first ionic bonds in this salt are separeted because of the heat:

    CaBr ₂ (l) → Ca²⁺ (l) + 2Br⁻ (l).

    Reaction of reduction at cathode (-) : Ca²⁺ (l) + 2e⁻ → Ca (l).

    Reaction of oxidation at anode (+) : 2Br⁻ (l) → Br₂ (l) + 2e⁻.

    The anode is positive and the cathode is negative.
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