Question

Giving examples, state the difference between balanced and unbalanced chemical equations.

Answer 1

Balanced Chemical Equation	Unbalanced Chemical Equation
A balanced chemical equation has an equal numbers of atoms of different elements in the side of reactants and products.	An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reaction.
In a balanced chemical equation the sum of masses of the reactants is equal to the sum of the masses of the products.	In an unbalanced chemical equation the sum of masses of the reactants is  not equal to the sum of the masses of the products.
It obeys the law of conservation of mass	It does not obey the law of conservation of mass
Example:   Zn (s) + H2SO4 (aq) → ZnSO4(aq) + H2 (g)  Here, number of Zn, H, S and O are same in both reactants' and products' side.	Example:   H2 + O2 → H2O Here, one oxygen atom is more in reactant's side than in product's side; it means one atom of oxygen is being destroyed, which is a violation of law of conservation of mass