Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 3. Chemical Reactions
Balancing of Chemical Equation
Balancing of Chemical Equation : Observe the following two chemical equations : Zn + H2SO4 → ZnSO4 + H2.........(i) Na + H2O → NaOH + H2 .........(ii) In equation (i), the number of atoms of Zn, H, S and O are equal on both sides, i.e., the equation is balanced - Balanced Equations : The equations in which atoms of various elements on the reactants' and the products side are equal. Equation (ii) is not balanced because the number of hydrogen atoms in not equal on both sides. It is called a skeleton chemical equation. Reason of Balancing Equations The number of atoms of elements on both sides of a chemical equation should be equal in accordance with the law of conservation of mass.