How do you balance redox reactions using the oxidation number method?
In order to balance redox reaction using oxidation number method, we have to follow the steps given below:
- First identify the oxidation number of all the elements given in the reaction.
- Then determine which element undergoes oxidation and which undergoes reduction by noting the changes in oxidation number.
- Calculate the changes in oxidation numbers, if the element undergoes oxidation the oxidation number will increase and if element undergoes reduction the oxidation number will decrease.
- Equate the total increase or decrease by multiplying with appropriate coefficients
- Except H and O balance all the remaining elements
- Balance oxygen atom by adding H 2 O
- Balance hydrogen atoms by adding H + or OH -
- Now the last step is to check whether charge and number of atoms are equal on both sides.