Check sibling questions

What is a balanced chemical equation? Why should chemical equations be balanced?

Answer

A balanced chemical equation has an equal number of atoms of different elements in reactants and products.

 

No. of atoms of elements in Reactants = No. of atoms of elements in Products

 

For eg, 

Fe 2 O 3 + 2Al  →  Al 2 O 3 + 2Fe

 

Name of the Element

No. of atoms in reactants

No. of atoms in products

Iron

2

2

Oxygen

3

3

Aluminium

2

2

 

Number of atoms of Fe in reactants = Number of atoms of Fe in products = 2

Number of atoms of O in reactants = Number of atoms of O in products = 3

Number of atoms of Al in reactants = Number of atoms of Al in products = 2

 

  • An unbalanced chemical equation is not an accurate representation of a chemical equation and thus it requires balancing.
  • Chemical reactions should be balanced in order to obey the law of conservation of mass , which states that mass can neither be created nor be destroyed.
  • Hence, the total mass of substances before the chemical reaction should be equal to the total mass of reactants after the reaction .

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo