pBlock ElementsII 1 Question 112
109. Explain, “orthophosphoric acid, $\mathrm{H} _{3} \mathrm{PO} _{4}$ is tribasic but phosphorous acid, $\mathrm{H} _{3} \mathrm{PO} _{3}$ is dibasic”.
$(1982,1 \mathrm{M})$
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Solution:
Orthophosphoric acid $\left(\mathrm{H} _{3} \mathrm{PO} _{4}\right)$ has three replaceable (acidic) hydrogen while orthophosphorus acid $\left(\mathrm{H} _{3} \mathrm{PO} _{3}\right)$ has only two replaceable hydrogen.
BETA
