Question

What is a balanced chemical equation? Why should chemical equations be balanced?
NCERT Solutions for Class 10th Science Chapter 1 Chemical Reactions and Equations Exercise 4

NCERT Class X
Science - Science

Chapter_Chemical Reactions and Equations

Answer 1

Answer:

According to this law, mass can neither be created nor be destroyed in a chemical reaction and obeying this law total mass of the elements or molecules present on the reactant side should be equal to the total mass of elements or molecules present on the product side.

Answer 2

Solution:

The eqation for a chemical reaction in which the number of atoms of each element is same in reactants and products is called a Balanced Chemical Equation.

Example of a balanced chemical equation:

$2H_2 + O_2 \rightarrow 2H_2O$

Chemical equations should be balanced to obey the Law of Conservation of Mass.

According to Law of Conservation of Mass,

"Mass can neither be created nor be destroyed"

In simple words, the total mass of the substances before the chemical reaction should be equal to the total mass of the substance after the chemical reaction.