Question

What is a balanced chemical equation? Why should chemical equations be
balanced?
Translate the following statements into chemical equations and then balance them.​

Answer 1

Answer:

If in a chemical equation the total number of atoms in the reactant side are equal to the total number of atoms in the product side then the chemical reaction is said to be balanced. For example The chemical reaction should be balanced show that it can follow the law of conservation of mass

Answer 2

Explanation:

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

H2(g)+N2(g)→NH3

The balanced equation for this reaction can be written as:

3H2(g)+N2(g)→2NH3

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

H2S(g)+O2(g)→H2O+SO2

The balanced equation for this reaction can be written as:

2H2S(g)+3O2(g)→2H2O+2SO2

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

BaCl2+Al2(SO4)3→AlCl3+BaSO4↓

The balanced equation for this reaction can be written as:

3BaCl2+Al2(SO4)3→2AlCl3+3BaSO4↓

(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

K+H2O→KOH+H

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