For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.

5 answers

I'll get you started.
2OH^- + NO2^- ==> NO3^- + 2e + H2O
Cu^2+ + 2e ==> Cu although I assume the Cu^2+ would be present as Cu(OH()2
yhtr
NO2{-} + Cu{2+} + 2 OH{-} → NO3{-} + Cu + H2O
NO2^- + 2Cu^2+ + 2OH^− ⟶ NO3^- + 2Cu^+ + H2O ;)
NO2^- + 2Cu^2+ + 2OH^− ⟶ NO3^- + 2Cu^+ + H2O ;)