Question

1. Translate the following statements into chemical equations and then balance them:
A) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
B) Methane burns in oxygen to form CO2 and water. Write a balanced equation for the reaction​

Answer 1

Explanation:

(a) Hydrogen gas combines with nitrogen to form ammonia.

H

2

(g)+N

2

(g)→NH

3

The balanced equation for this reaction can be written as:

3H

2

(g)+N

2

(g)→2NH

3

(b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

H

2

S(g)+O

2

(g)→H

2

O+SO

2

The balanced equation for this reaction can be written as:

2H

2

S(g)+3O

2

(g)→2H

2

O+2SO

2

(c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.

BaCl

2

+Al