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7.12 What happens when H3PO3 is heated?

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    alok kumar singh | Contributor-Level 10

    4 months ago

    7.12

    H3PO3 on heating dissociates into orthophosphoricacid (H3PO4) and phosphine (PH3). Since, the oxidation states of orthophosphorous acid (H3PO3), orthophosphoric acid (H3PO4) and phosphine (PH3) are +3, +5 and -3 respectively, this reaction is known as a disproportionate reaction (since the oxidation states of one of the product are positive and the other is negative). The reaction is as follows.

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