Question

A Q.4. Translate the following statements into chemical
equations and then balance them.
(a) Hydrogen gas combines with nitrogen to form
ammonia
(b) Hydrogen sulphide gas burns in air to give water
and sulpur dioxide.
(c) Barium chloride reacts with aluminium sulphate
to give aluminium chloride and a precipitate of
barium sulphate.
(d) Potassium metal reacts with water to give potassium
hydroxide and hydrogen gas.​

Answer 1

a. 3H +N = NH3

b.H2S+ 3O=H2O +SO

c.3BaCl2 + Al2 (SO4)3 = 2AlCl3 + 3BaSO4

d.K+ H2O = KOH + H

Explanation:

a. hydrogen = H

nitrogen = N

ammonia = NH3

So equation is,

H + N = NH3

therefore, 3H + N = NH3

b. hydrogen sulphide = H2S

In air there are many gases but in this equation we required had is oxygen

therefore I have used = O

Water = H2O

Sulphur Dioxide = SO2

So equation will be

H2S + O = H2O + SO2

So after balancing the equation

H2S + 3O = H2O + SO2

c. Barium chloride = BaCl2

Aluminium Sulphate = Al2(SO4)3

Aluminium Chloride = AlCl3

Barium sulphate = BaSO4

so equation will be

BaCl2 + Al2 (SO4)3 = AlCl3 + BaSO4

after balancing the equation it will be

3BaCl2 +Al2 (SO4)3 = 2AlCl3 + 3 BaSO4

d. Potassium = K

Water = H2O

Potassium hydroxide = KOH

Hydrogen gas = H

So equation will be

K + H2O = KOH + H

And equation is already balanced so there's no need to balance it.