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Question
The oxidation states of phosphorus in hypophosphorus acid and pyrophosphoric acid are ______ and ______ respectively.
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Solution
The oxidation states of phosphorus in hypophosphorus acid and pyrophosphoric acid are +1 and +5 respectively.
Explanation:
In hypophosphorous acid (H3PO2), only one hydrogen is bonded to oxygen, so phosphorus shows an oxidation state of +1. In pyrophosphoric acid (H4P2O7), the average oxidation state of each phosphorus atom is +5, as it forms bonds with more oxygen atoms.
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