Question

Give a reason for the following

The chemical equation should always be balanced.

Answer 1

Chemical reactions:

• Chemical reactions can be represented by chemical equations. The substances that take part in the chemical reaction are called reactants and the chemicals which are formed as a result of the reaction between reactants is known as product.
• Balanced equation: The chemical equation in which the number of atoms of each element on the reactant side as well as the product side is equal is known as a balanced equation.
• For example,$\underset{\mathrm{hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Significance of balanced equation:

• It gives information about the number of molecules or atoms of reactants and products.
• The actual mass of reactant and product formed can be calculated with the help of a balanced chemical equation.
• A chemical equation should always be balanced so that the total mass of reactants and products should be equal according to the law of conservation of mass.