Question

why is it necessary to obtain a Balanced chemical equation​

Answer 1

The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.

Answer 2

An equation must be balanced in order to comply with the "Law of Conservation of mass" .

The law of conservation of mass states that mass can neither be created nor destroyed. Hence, in a chemical reaction, the total mass of the products. It means that the total number of atoms of each element should be equal on both sides of a chemical equation.