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The standard reduction potential at 25^(...

The standard reduction potential at `25^(@)C` of the reaction
`2H_(2)O+2e^(-)hArrH_(2)+2overset(Θ)(O)H` is `-0.8277V`. Calculate the equilibrium constant for the reaction.
`2H_(2)OhArrH_(3)O^(o+)+overset(Θ)(O)H` at `25^(@)C` .

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