what is basicity of H3PO3
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2 is the basasity of H3Po3
because only two hydrogen ion is replaced to form hydronium ion aqueous solution one Hydrogen is attached to oxygen (hydrogen bonding).
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basicity of H3PO3 is 2. basicity is number of replaceable hydrogen. as in phosphonic acid there are 3 hydrogen atoms but only 2 out of them are attached to the most electronegative oxygen atom. therefore, they can easily removed. thus, although this acid has 3 hydrogen but it's basicity is 2.
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