Explanation:
A chemical reaction equation that contains same number of atoms on both reactant and product side is known as a chemically balance reaction equation.
For example, [tex]Al_{2}O_{3} + NaOH \rightarrow NaAlO_{2} + H_{2}O[/tex]
Number of atoms on reactant side are as follows.
Al = 2
O = 4
Na = 1
H = 1
Number of atoms on product side are as follows.
Al = 1
O = 3
Na = 1
H = 2
Therefore, to balance this chemical equation we multiply NaOH by 2 on reactant side. Whereas multiply [tex]NaAlO_{2}[/tex] by 2 on product side.
Therefore, the complete balance chemical equation will be as follows.
[tex]Al_{2}O_{3} + 2NaOH \rightarrow 2NaAlO_{2} + H_{2}O[/tex]
