The number of acidic protons in H_{3}PO_{3} i | vedclass

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Question

(C) The structure of phosphorous acid $(H_{3}PO_{3})$ contains one $P=O$ bond, two $P-OH$ bonds, and one $P-H$ bond.Protons attached directly to oxyge

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(C) The structure of phosphorous acid $(H_{3}PO_{3})$ contains one $P=O$ bond, two $P-OH$ bonds, and one $P-H$ bond.Protons attached directly to oxygen atoms in $P-OH$ groups are acidic because the oxygen atom is highly electronegative, which facilitates the release of the $H^+$ ion.The hydrogen atom directly bonded to the phosphorus atom $(P-H)$ is not acidic because the electronegativity difference between $P$ and $H$ is very small.Therefore, $H_{3}PO_{3}$ has $2$ acidic protons.

The number of acidic protons in $H_{3}PO_{3}$ is:

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