What happens when
H3PO3 is heated ?
Write the reactions involved.
What happens when H3PO3 is heated? Write the equations.
On heating, H3PO3 decomposes into phosphoric acid and phosphine.
H3PO3, on heating, undergoes disproportionation reaction to form PH3 and H3PO4. The oxidation numbers of P in H3PO3, PH3, and H3PO4 are +3, −3, and +5 respectively. As the oxidation number of the same element is decreasing and increasing during a particular reaction, the reaction is a disproportionation reaction.