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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: Electrochemistry

Olympiad workbook · NSEC · Electrochemistry

The standard redox potential for the reaction 2 H_2 O arrow O_2+4...

The standard redox potential for the reaction

2 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrme^{-}

is -1.23 V . If the same reaction is carried out at

25^{{}^{{}^{\circ}}} \mathrm{C}

and at

\mathrm{pH}=7

, the potential will be

Options

A $-0.82 \mathrm{~V}$
B $-3.28 \mathrm{~V}$
C0.82 V
D $-1.18 \mathrm{~V}$

Correct answer

A. $-0.82 \mathrm{~V}$

Step-by-step solution

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