The reactions occurring in this sequence are:
Overall reaction:
Cu + O2 + 4HNO3 + 2NaOH -> Cu + 2NaNO3 + 2H2O + O2
The reactions occurring in this sequence are:
Cu + O2 -> CuOCuO + Cu -> 2CuO2CuO + 4HNO3 -> 2Cu(NO3)2 + 2H2O + O2Cu(NO3)2 + 2NaOH -> Cu(OH)2 + 2NaNO3Cu(OH)2 -> CuO + H2OCuO + H2 -> Cu + H2OOverall reaction:
Cu + O2 + 4HNO3 + 2NaOH -> Cu + 2NaNO3 + 2H2O + O2