Please explain how to balance equation

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Gaurav Seth 5 years, 4 months ago
How to balance a chemical equation
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 atom
2
1
To balance
2
1 X 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 atom
2
4
To balance
2 X 2
4
So the final equation stands out to be
2H2 + O2 --> 2H2O
4Thank You