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Oxidation Number Calculator
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Whenever we come across any chemical reaction we also witness oxidation and reduction process or simply put redox reaction.
In any kind of chemical reaction one of the entities would gain and the other would lose electrons and that decides which one is undergoing oxidation and which one reduction.
Oxidation is a process where a reacting entity loses one or more electrons and the number of electron that it loses gives its oxidation state or number.

Oxidation Number Calculator
calculates the oxidation number for any chemical compound or element given.

Below is given a default compound, click "Calculate Oxidation Number". It gives the oxidation number of the given element in the compound.
 

Steps for Oxidation Number Calculator

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Step 1 :  

Observe the given chemical reaction. Find the oxidation number of all the elements present in that reaction. Depending on the number of atoms present in any element multiply atoms with the oxidation number of that particular element.



Step 2 :  

Now add the Oxidation number of all the elements present to get the oxidation number of the given compound.



Problems on Oxidation Number Calculator

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  1. Find the Oxidation number of Calcium oxide or CaO.


    Step 1 :  

    Given: The Compound is CaO. The Oxidation state of Calcium Ca = 2 and for Oxygen O = -2.



    Step 2 :  

    Over all oxidation state for the compound would be (+2 ) x 1 + (-2) x 1 = 2 – 2 = 0



    Answer  :  

    Hence the Oxidation state of Calcium is +2 and Oxygen is -2 and the compound is said to be stable.



  2. Find the Oxidation number of NH3.


    Step 1 :  

    Given: The Compound is NH3. The Oxidation state of Calcium Na = -3 and for Hydrogen H = +1.



    Step 2 :  

    Over all oxidation state for the compound would be (-3) x 1 + (+1) x 3 = -3 + 3 = 0.


    The overall oxidation state for NH3 would be 0.



    Answer  :  

    Hence the Oxidation state of Nitrogen is -3 and Hydrogen is +1 and the compound is said to be stable.



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