
Concept explainers
Interpretation:
The balancing of atoms in a chemical equation must be explained.
Concept introduction:
A balanced chemical equation is the evidence of conservation of mass.

Answer to Problem 1TAI
Atoms in a chemical equation can be balanced by manually counting the number of each atom in both the side of chemical equation.
Explanation of Solution
As mass is conserved so in a
For example, the reaction of Fe and HCl is balanced in the following way:
In this reaction there is one Fe atom in both the side. But in right side there are two Cl and two H atoms. In left side, number of H and Cl atom is 1.
To make these equal, there must be 2 moles of HCl in the left side.
Thus, balanced chemical equation will be:
In the balanced equation, the coefficients of Fe, HCl, FeCl2 and H2 are 1,2, 1 and 1 respectively.
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