In the diagram above, the gas produced is?
In this laboratory preparation, 50% trioxonitrate (V) acid is reacted with copper turnings to liberate nitrogen (II) oxide ( NO ) that is collected by downward delivery.
Cu+4HNO3→Cu(NO3)2+2NO2+2H2O4\mathrm{HNO}_3 \rightarrow \mathrm{Cu(NO_3)_2} + 2\mathrm{NO}_2 + 2\mathrm{H_2O}4HNO3→Cu(NO3)2+2NO2+2H2O
