A balanced chemical equation has number atoms of each element equal on both left and right sides of the reaction. A chemical reaction is balanced when the number of atoms of each element on both sides of an arrow is equal. There are three methods to balance a chemical equation hit and trial method, oxidation number method a and ion-electron method. There is one general basic principle in the above three methods, i.e. Law of conservation of mass. The representation of a chemical reaction with the help of chemical symbols and formulate of substances involved in it is called a chemical equation.
Section 1: Chemical Reactions And Equations