A balanced chemical equation shows that the number of atoms of each element on the reactant side (left) is equal to the number of atoms of that element on the product side (right). This ensures the law of conservation of mass is obeyed, meaning that matter is neither created nor destroyed during a chemical reaction.
Why balance chemical equations?
To follow the law of conservation of mass:
This fundamental principle states that matter cannot be created or destroyed in a closed system.
Accurate representation of chemical reactions:
A balanced equation accurately represents the reactants and products involved in a chemical reaction, ensuring that the correct ratio of substances is used.
Predicting reaction outcomes:
Balancing allows for accurate stoichiometric calculations, which are essential for predicting the amounts of reactants and products involved in a reaction.
Ensuring completeness:
A balanced equation demonstrates that the chemical reaction has been fully represented, meaning that all atoms of each element have been accounted for.