Question

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(c) Iron + sulphuric acid $\to$ ferrous sulphate + hydrogen.

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ($Fe{S}_2$) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

Answer 1

Balanced chemical reaction: A balanced chemical reaction represents a reaction in which the number of atoms of each element is equal on both the reactant and product side.

(a). $\text{Sodium hydroxide + Sulphuric acid}$ $⟶$ $\text{Sodium sulphate + Water}$

$2NaOH$(aq) + $H_{2}S{O}_4$(aq) $\to$ $N{a}_{2}S{O}_4$(s) + $2H_{2}O$(l)

(b). $\text{Potassium bicarbonate+Sulphuric acid}$$\to$$\text{Potassium sulphate+Carbon dioxide+Water}$

$2KHC{O}_3$(aq) + $H_{2}S{O}_4$(aq) $\to$ $K_{2}S{O}_4$(s) + $2C{O}_2$(g) + $2H_{2}O$(l)

(c) $\text{Iron + Sulphuric acid}$ $\to$ $\text{Ferrous sulphate + Hydrogen}$

$Fe$(s) + $H_{2}S{O}_4$(aq) $\to$ $FeS{O}_4$(s) + $H_2$(g)

(d) $\text{Chlorine + Sulphur dioxide + Water}$ $\to$ $\text{Sulphuric acid + Hydrogen chloride}$

$S{O}_2$(g) + $C{l}_2$(g) + $2H_{2}O$(l) $\to$ $H_{2}S{O}_4$(aq) + 2$HCl$(aq)

(e) $\text{Silver nitrate}$ $\to$ $\text{Silver + Nitrogen dioxide + Oxygen}$

$2AgN{O}_3$(aq) $\to$ $2Ag$(s) + $2N{O}_2$(g) + $O_2$(g)

(f) $\text{Copper + Nitric acid}$ $\to$ $\text{Copper nitrate + Nitric oxide + Water}$

$3Cu$(s) + $8HN{O}_3$(aq) $\to$ $3Cu(N{O}_3{)}_2$(aq) +$2NO\left(g\right)$+ $4H_{2}O$(l)

(g) $\text{Ammonia + Oxygen}$ $\to$ $\text{Nitric oxide + Water}$

$4N{H}_3$(g) + $5O_2$(g) $\to$ $4NO$(g) + $6H_{2}O$(l)

(h) $\text{Barium chloride + Sulphuric acid}$ $\to$ $\text{Barium sulphate + Hydrochloric acid}$

$BaC{l}_2$(aq) + $H_{2}S{O}_4$(aq) $\to$ $BaS{O}_4$(s) + $2HCl$(aq)

(i) $\text{Zinc sulphide + Oxygen}$ $\to$ $\text{Zinc oxide + Sulphur dioxide}$

$2ZnS$(s) + $3O_2$(g) $\to$ $2ZnO$(s) + $2S{O}_2$(g)

(j) $\text{Aluminium carbide + Water}$ $\to$ $\text{Aluminium hydroxide + Methane}$

$A{l}_4{C}_3$ + $12H_{2}O$ $\to$ $4Al(OH{)}_3$ + $3C{H}_4$

(k) $\text{Iron pyrites (}Fe{S}_2\text{) + Oxygen}$ $\to$ $\text{Ferric oxide + Sulphur dioxide}$

$4Fe{S}_2$ + $11O_2$ $\to$ $2F{e}_2{O}_3$ + $8S{O}_2$

(l) $\text{Potassium permanganate + Hydrochloric acid}$ $\to$ $\text{Potassium chloride + Manganese chloride + Chlorine + Water}$

$2KMn{O}_4$ + $16HCl$ $\to$ $2KCl$ + $2MnC{l}_2$ + $5C{l}_2$ + $8H_{2}O$

(m) $\text{Aluminium sulphate + Sodium hydroxide}$ $\to$ $\text{Sodium sulphate + Sodium meta aluminate + Water}$

$A{l}_2(S{O}_4{)}_3$ + $8NaOH$ $\to$ $2NaAl{O}_2$ + $3N{a}_{2}S{O}_4$ + $4H_O$

(n) $\text{Aluminium + Sodium hydroxide + Water}$ $\to$ $\text{Sodium meta aluminate + Hydrogen}$

$2Al$ + $2NaOH$ + $2H_{2}O$ $\to$ $2NaAl{O}_2$ + $3H_2$

(o) $\text{Potassium dichromate + Sulphuric acid}$ $\to$ $\text{Potassium chloride + Chromium chloride + Water + Chlorine}$

$K_{2}C{r}_2{O}_7$ + $14HCl$ $\to$ $2KCl$ + $2CrC{l}_3$ + $7H_{2}O$ + $3C{l}_2$

(p) $\text{Sulphur + Nitric acid}$ $\to$ $\text{Sulphuric acid + Nitrogen dioxide + Water}$

$S$ + $HN{O}_3$ $\to$ $H_{2}S{O}_4$ + $N{O}_2$ + $H_{2}O$

(q) $\text{Sodium chloride + Manganese dioxide + Sulphuric acid}$ $\to$ $\text{Sodium hydrogen sulphate + Manganese sulphate + Water + Chlorine}$

$NaCl$ + $Mn{O}_2$ + $H_{2}S{O}_4$ $\to$ $NaHC{O}_3$ + $MnS{O}_4$ + $H_{2}O$ + $Cl$