Chemistry > p Block Elements > 11.0 Oxyacids 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
11.2 Oxidation of Metalloid and Inorganic compounds by Nitric acid
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
Oxidation of metalloids
Metalloids like non-metals also form higher oxyacids.
(1) Arsenic is oxidised to arsenic acid.$$2As + 10HN{O_3} \to 2{H_2}As{O_4} + 10N{O_2} + 2{H_2}O$$ OR $$As + 5HN{O_3} \to {H_2}As{O_4} + 5N{O_2} + {H_2}O$$
(2) Antimony is oxidised to antimonic acid.$$\begin{equation} \begin{aligned} Sb + 5HN{O_3} \to {H_2}Sb{O_4} + 5N{O_2} + {H_2}O \\ \;\;\;\;conc.\;\ \;hot \\\end{aligned} \end{equation} $$
(3) Tin is oxidised to meta-stannic acid.$$Sn + 2HN{O_3} \to {H_2}Sn{O_3} + 4N{O_2} + {H_2}O$$
Oxidation of Compounds:
(1) Sulphur dioxide is oxidized to sulphuric acid.$$S{O_2} + 2HN{O_3} \to {H_2}S{O_4} + 2N{O_2}$$
(2) Hydrogen sulphide is oxidized to sulphur.$${H_2}S + 2HN{O_3} \to 2N{O_2} + 2{H_2}O + S$$
(3) Ferrous sulphate is oxidized to ferric sulphate in presence of $H_2SO_4$.$$6FeS{O_4} + 3{H_2}S{O_4} + 2HN{O_3} \to 3F{e_2}{(S{O_4})_3} + 2NO + 4{H_2}O$$
(4) Iodine is liberated from $KI$.$$6KI + 8HN{O_3} \to 6KN{O_3} + 2NO + 3{I_2} + 4{H_2}O$$
(5) $HBr,\ HI$ are oxidised to $Br_2$ and $I_2$, respectively.$$2HBr + 2HN{O_3} \to B{r_2} + 2N{O_2} + 2{H_2}O$$ Similarly, $$2HI + 2HN{O_3} \to {I_2} + 2N{O_2} + 2{H_2}O$$
(6) Ferrous sulphide is oxidized to ferrous sulphate.$$FeS + HN{O_3} \to FeS{O_4} + 8N{O_2} + 4{H_2}O$$
(7) Stannous chloride is oxidized to stannic chloride in presence of $HCl$. $$7SnC{l_2} + 14HCl + 3HN{O_3} \to 7SnC{l_4} + N{H_2}OH + N{H_4}N{O_3} + 5{H_2}O$$
(8) Cane sugar is oxidized to oxallic acid.$${C_{12}}{H_{22}}{O_{11}} + 36HN{O_3} \to 6{(COOH)_2} + 36N{O_2} + 23{H_2}O$$
