A chemistry problem by Satyabrata Dash

Chemistry Level 2

How many Faradays are required to reduce 1 mole of of B r O 2 − BrO_{2}^{-} to B r − Br^{-} ?


The answer is 4.

Satyabrata Dash by Satyabrata Dash , 20, India

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1 solution

Complete reaction will be:

B r O 2 − BrO_{2}^{-} + 4 H + 4H^{+} + 4 e − 4e^{-} → \to B r − Br^{-} + 2 H 2 O 2H_{2}O

for 1 mole B r O 2 − BrO_{2}^{-} needs 4 moles of e − e^{-} .

it means required 4 Faradays to reduce 1 mole of B r O 2 − BrO_{2}^{-}

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