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Assigning Oxidation Numbers

Oxidation sta...

Question

Oxidation state of Cl in ClO₂is?

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Solution

Oxygen almost always keeps an oxidation number of -2.
Since the overall ion has a charge of -1 you just have to balance the ion.
2*-2 for the oxygen = - 4
In order for the overall charge to be -1, the chlorine must have a +3 oxidation number

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Q. In which of the following compounds

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