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General Mechanism of Electrophilic Aromatic Substitution

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Question

What is the standard reduction potential at $25^{0}$ C for the reduction of water?

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Solution

$H_{2} O \to H_{2} + \frac{1}{2} O_{2}$
Since reduction potential is considered to be zero at $25^{0} C$ at 1M concentration for above reaction (Assumption by IUPAC),so $E^{0} = z e r o$

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