Chemistry > p Block Elements > 10.0 Oxides of nitrogen
p Block Elements
1.0 Group $13$ – The Boron Family
2.0 Boron
3.0 Compounds of boron
4.0 Compounds of Aluminium
5.0 Group $14$ – The Carbon family
6.0 Allotropes of Carbon
7.0 Compounds of Carbon
8.0 Properties of Silicon
9.0 Group $15$-The Nitrogen Family
10.0 Oxides of nitrogen
10.1 Nitrogen Oxide $N_2O$ or Laughing gas (Neutral)
10.2 Nitric Oxide $NO$ (Neutral)
10.3 Nitrogen trioxide $N_2O_3$
10.4 Nitrogen dioxide or Di-nitrogen tetroxide $NO_2$ or $N_2O$
10.5 Nitrogen pentaoxide $N_2O_5$
11.0 Oxyacids of Nitrogen
11.1 Nitric acid $HNO_3$
11.2 Oxidation of Metalloid and Inorganic compounds by Nitric acid
11.3 Action of Metals & Proteins
12.0 Phosphorus
13.0 Oxygen
14.0 Sulphur
10.3 Nitrogen trioxide $N_2O_3$
10.2 Nitric Oxide $NO$ (Neutral)
10.3 Nitrogen trioxide $N_2O_3$
10.4 Nitrogen dioxide or Di-nitrogen tetroxide $NO_2$ or $N_2O$
10.5 Nitrogen pentaoxide $N_2O_5$
11.2 Oxidation of Metalloid and Inorganic compounds by Nitric acid
11.3 Action of Metals & Proteins
This oxide is also called nitrogen sesquioxide or nitrous anhydride.
Preperation:
It is obtained by the reduction of nitric acid with arsenious oxide.$$A{s_2}{O_3} + 2HN{O_3} + 2{H_2}O \to 2{H_3}As{O_4} + {N_2}{O_3}$$
It is known in the pure state in solid at very very low temperature. In the vapour state, it is present as an equimolar mixture of $NO$ and $NO_2$.
(a) It condenses to a blue colored liquid at $-30^\circ C$. The liquid when warmed at room temperature, decomposes to a mixture of $NO$ and $NO_2$ (Brown colored)
\[{N_2}{O_3}(Blue\;colored\;gas)\xrightarrow{{Room\;Temperature}}NO + N{O_2}(Brown\;colored\;gas)\]
(b) It is an acidic oxide, It forms nitrous acid and water and hence the name nitrous anhydride.$${N_2}{O_3} + {H_2}O \to 2HN{O_3}$$
The oxide combines with caustic alkali forming the corresponding nitrite.$$2NaOH + {N_2}{O_3} \to 2NaN{O_2} + {H_2}O$$
