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# Oxidation Number Calculator

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In a Redox reaction or oxidation-reduction reactions, electrons are lost or gained by an atom. Loss of electrons refers to oxidation where as gain of electrons refers to reduction. This online oxidation number calculator calculates the oxidation number of a compound by adding the oxidation number of individual elements.

## Steps

Step 1 : Find the oxidation number of individual elements of the given compound.

Step 2 : Multiply the number of atoms present in an element with the oxidation number of the element. Then, add up all the elements present to get the oxidation number of the compound.

## Problems

Here are some of the problems based on oxidation number.

### Solved Examples

Question 1: Find the oxidation number of the compound $CaCO_3$?
Solution:

Step 1 : Given compound : $CaCO_3$
Oxidation number of Ca = +2, C = +4 and O = -2

Step 2 : Oxidation number of $CaCO_3$ = (+2) + (+4) + (-2) $\times$ (3) = 0
Hence, the oxidation number of CaCO3 is 0

Question 2: Find the oxidation number of the compound $KMn_4$?

Solution:

Step 1 : Given compound : $KMnO_4$
Oxidation number of K = +1, O = -2 and Mn = +7

Step 2 : Oxidation number of $KMnO_4$ = (+1) + (+7) + (-2) $\times$ 4  = 0
Hence, the oxidation number of $KMnO_4$ is 0