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Why is Bi(V) a stronger oxidant than Sb(...

Why is Bi(V) a stronger oxidant than Sb(V) ?

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Bismuth (Bi) in the pentavalent state can easily accept two electrons and gets reduced to trivalent bismath.
`Bi^(5+) + 2e^(-) to Bi^(3+)`
Therefore , it acts as a strong oxidising agent .
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