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NO(3)^(-) rightarrow NO(2)(acid medium),...

`NO_(3)^(-) rightarrow NO_(2)`(acid medium), `E^(@0 = 0.790)V`
`NO_(3)^(-) rightarrow NH_(3)OH^(+)` (Acid medium). `E^(@) = 0.731V`
At what pH, the above two will have same E value? Assume the concentration of all other species `NH_(3)OH^(+)` except `[H^(+)]` to be unity. (Give your answer by excluding the decimal places).

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