Question

Why is it necessary to balance a chemical equation?

Hint:

Balancing a chemical equation ensures that the number of atoms of each element remains the same on both sides of the reaction.

Answer 1

A chemical equation must be balanced to follow the law of conservation of mass, which states that the mass of reactants must equal the mass of products.
Example:
Unbalanced: \[ H_2 + O_2 \rightarrow H_2O \] Balanced: \[ 2H_2 + O_2 \rightarrow 2H_2O \]