What product is formed on disproportionation of H3PO3?


The reactions in which a single reactant is oxidized and reduced is known as Disproporionation reactions.

The disproportionation reaction is given below

2H2O2 → 2H2O + O2

Above reaction is a disproportionation reaction because O is reduced in forming HO and oxidized in forming O

Disproportionation of H3PO3

When H3PO3 is heated, it gives two products. H3PO3 undergoes a disproportionation reaction when heated, yielding ortho phosphoric acid and phosphine.

4 H3PO3 → 3 H3PO4 + PH3

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