Question

what is a balanced chemical equation? why should chemical equation be balanced?

Answer 1

A balanced chemical equation is the one in which the number of reactants is equal to the number of products. Eg: H2 + Cl2 -> 2HCl

It is important to balance a chemical equation in order to prevent the violation of the law of conservation of matter.

Hope it helps:)

Answer 2

A balanced chemical equation is an equation in which the number of atoms of each element of the reactant is equal to that of the product.

chemical equation should be balanced in order to maintain the law of conservation of energy according to whi h matter is neither created nor destroyed , it is only tranformed from one form to another.

example-
unbalanced equation-
CH4 + Cl2 ------->CCL4 + HCL
balanced equation-
CH4 + 4Cl2-------> CCl4 + 4HCL