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The observed emf of the cell, Pt|H(2) ...

The observed emf of the cell,
`Pt|H_(2) ("1 atm")|H^(+)(3xx10^(-4) M)||H^(+) (M_(1))|H_(2) ("1 atm")|Pt`
is 0.154 V. Calculate the value of `M_(1)` and pH of cathodic solution.

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