why do we write 2h2 + 02 ---- 2h20 when we can write h2+02 --- h20
Answers
Explanation:
↪️In the given reaction, hydrogen is reacting with oxygen to produce water.
The chemical equation involved is
H_2O+O_2arrow H_2OH
2
O+O
2
arrowH
2
O
When the number of atoms for the reactant side is calculated it gives:
H = 2
O = 2
When the number of atoms for the product side is calculated it gives:
H = 2
O = 1
The obtained result indicates that the oxygen atom is not equal on both sides. Thus the reaction is not balanced.
The balanced reaction has the number of atoms involved in reaction in reactants as well as the product is equal.
To make both side equal some changes must be made as shown in the balanced equation is
2H_2+O_2arrow 2H_2O2H
2
+O
2
arrow2H
2
O
For the above equation, the number of atoms in the reactants is:
H = 4
O = 2
The number of atoms in products is:
H = 4
O = 2
As the number of atoms in the reactants side is equal to the number of atoms in the product side, the reaction is balanced.