# Why should we balance a chemical equation ? Take any one chemical equation and explain the procedure of balancing it.

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Why should we balance a chemical equation ? Take any one chemical equation and explain the procedure of balancing it.

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Chemical reactions obey law of conservation of mass. So the total number of atoms of each elements in the reactants must be equal to the total number of atoms of each element in the products. So we should have to balance chemical equation.

Eg : H2 + O2 → H2

Step -1 : Unbalanced equation = H2 + O2 → H2

Step – 2 : Compare no. of atoms of each element on both sides.

 Atom No. of atoms in L.H.S No. of atoms in R.H.S H 2 (in H2 ) 2 (in H2O) 0 2 (in O2 ) 1 (in H2O)

No. of 0 atoms balancing – H2 + O2 → 2H2O

No. of H atoms balancing – 2H2 + O2 → 2H2

Step – 3 : The above equation is balanced and write the coefficients in the smallest ratio. 2H+ O2 → 2H2

Step – 4 : Verify above equation for balancing of atoms each element on both sides. Hence the equation is balanced.

∴ 2H2 + O2 → 2H2O