Oxidation Number Calculator: Find Unknown Oxidation States Instantly

Calculate Oxidation Number of an Unknown Element


Known Element 1 (Optional, leave blank if not applicable)


Known Element 2 (Optional, leave blank if not applicable)


Unknown Element (Required)

Unravel the complexity of chemical compounds with our Oxidation Number Calculator. This essential tool helps you quickly determine the oxidation state of an unknown element within a molecule or polyatomic ion by applying fundamental chemistry principles. Perfect for students and professionals alike, it simplifies the analysis of redox reactions and chemical bonding.

Formula:

The oxidation number of an unknown element (X) in a compound or ion can be determined using the fundamental rule that the sum of all oxidation numbers must equal the overall charge of the compound or ion.


Let's consider a compound An1Bn2XnX with an overall charge:


  • ni = Number of atoms of element i
  • oxi = Known oxidation number of element i
  • nX = Number of atoms of the unknown element X
  • overall_charge = Total charge of the compound or ion

The formula applied is:

(n1 × ox1) + (n2 × ox2) + (nX × oxX) = overall_charge

Solving for oxX (the oxidation number of X):

oxX = (overall_charge - (n1 × ox1) - (n2 × ox2)) / nX

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