In a coulometric method, 200 mg of nitrobenzene in of methanol is reduced to phenyl hydroxylamine at a constant potential of -0.95 V (vs. SCE) applied to an Hg electrode. Following reaction takes 30 minutes to complete.
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Calculate the percentage of nitrobenzene if above reduction requires 32mA current.
First, we calculate the total charge passed during the reaction. The current (I = 32\ \text{mA} = 0.032\ \text{A}) and the time (t = 30\ \text{minutes} = 30 \times 60 = 1800\ \text{s}). [ Q = I \cdot t = 0.032 \times 1800 = 57.6\ \text{C} ] The ___ _____ ___ _____ ________ ___ ___ _________ ______ ________.
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