[galpinj]

In the equation NO₃^- (aq) + 2H⁺ (aq) + e- ---> NO₂ (g) + H₂O (l), the nitrate ion goes from a +5 oxidation state to a +4 oxidation state (gains one electron). Given that oxygen is more electronegative than nitrogen, shouldn't the nitrogen lose an electron (act as as a base) to the oxygen?

Likewise, would NO₃^-, if considered to itself be an acid, become N⁺ + O3^-?

Thank you

[mjc123]

The oxygen is already (formally) in its lowest oxidation state, -2. It can't accept any more electrons.

Likewise, would NO3-, if considered to itself be an acid, become N+ + O3-?

This is chemically meaningless; it's not charge-balanced, for a start.