Write the chemical formula and name the elements present in the following compounds.

a. Sodium chloride

b. Potassium hydroxide

c. Carbon dioxide

d. Calcium oxide

e. Sulphur dioxide

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Solution

Chemical formula Elements present

a Sodium chloride NaCl Sodium (Na), Chlorine (Cl)

b Potassium hydroxide KOH Potassium (K), Oxygen (O), Hydrogen (H)

c Carbon-di-oxide ${CO}_{2}$ Carbon (C), Oxygen (O)

d Calcium oxide CaO Calcium (C), Oxygen (O)

e Sulphur dioxide ${SO}_{2}$ Sulphur (S), Oxygen (O)

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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

(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 ( $F e S_{2}$ ) + 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

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(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.

Write the balanced chemical equations for the following reactions.

(a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

(b) Zinc + Silver nitrate → Zinc nitrate + Silver

(d) Barium chloride + Potassium sulphate → Barium sulphate +

Potassium chloride

Write the chemical formula and name the elements present in the following compounds.

a. Sodium chloride

b. Potassium hydroxide

c. Carbon dioxide

d. Calcium oxide

e. Sulphur dioxide

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		Chemical formula	Elements present
a	Sodium chloride	NaCl	Sodium (Na), Chlorine (Cl)
b	Potassium hydroxide	KOH	Potassium (K), Oxygen (O), Hydrogen (H)
c	Carbon-di-oxide	${CO}_{2}$	Carbon (C), Oxygen (O)
d	Calcium oxide	CaO	Calcium (C), Oxygen (O)
e	Sulphur dioxide	${SO}_{2}$	Sulphur (S), Oxygen (O)