Choose the reaction equations in which nitrogen is a reducing agent: 1) N2 + 3Mg = Mg3N2

Choose the reaction equations in which nitrogen is a reducing agent: 1) N2 + 3Mg = Mg3N2 2) 4NH3 + 3O2 = 2N2 + 6H2O 3) 2NO2 + 7H2 = 2NH3 + 4H2O 4) 4NO2 + O2 + 4KOH = 4KNO3 + 2H2O 5) 8HNO3 + H2S = H2SO4 + 8NO2 + 4H2O

Reducing agent – an element in the reaction that gives up its electrons (its oxidation state changes in the positive direction), the oxidation process is in progress.
1. Nitrogen from 0 gets the oxidation state -3 – it is an oxidizing agent, the reduction process
2. From -3 to 0. Nitrogen acts as a reducing agent, because donated his electrons.
3. From +4 to -3. Nitrogen is an oxidizing agent.
4. From +4 to +5. Nitrogen donated 1 electron, it is a reducing agent.
5. from +5 to +4. Nitrogen took one electron, it is an oxidizing agent.
If nitrogen acts as an oxidizing agent, its electrons are reduced, i.e. recovery process, it takes electrons from the reducing agent.
If nitrogen is a reducing agent, it gives electrons to the oxidizing agent, the oxidation process takes place.