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Why is the oxidation number of PO4 3?

Updated: 4/28/2022
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12y ago

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P = +5 PO4^3- = -3

4(-2) + p = -3

P =5

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12y ago
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9y ago

Phosphorus's oxidation number is +5. Oxygen's oxidation number is -2.

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Q: Why is the oxidation number of PO4 3?
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