Question

Describe a method of balancing a chemical equation by taking an example​

Answer 1

We take the reaction of formation of water.

H2 + O2 --> H2O (unbalanced equation for formation of water)

This equation can be balanced by using certain steps as mentioned below.

Step I: list the number of atoms of each element present on both sides of arrow.

Reactant. Product

H. 2. 2

O. 2. 1

Step II: Begin balancing with the compound having maximum number of atoms. Following this rule we select H2O. Here there are 2 oxygen atoms on the reactant side but only 1 oxygen atom on the product side. So equation is unbalanced. In order to balance we need to do following step.

Reactant. Product

Initial oxygen. 2. 1

atom

To balance. 2. 1×2

So the equation stands out to be

H2 + O2  --> 2H2O

Step III: After balancing oxygen the equation is H2 + O2 à 2H2O. So now we need to balance hydrogen atom.

Reactant. Product

Initial hydrogen. 2. 4

atom

To balance. 2×2. 4

So the final equation stands out to be

◆2H2 + O2 --> 2H2O.

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Answer 2

The same total of charges should appear on the left and right side of the equation.

Make one of the atoms equal on both sides by multiplying a molecule or compound with an integral number so that the desired element is balanced.

Or

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