pBlock ElementsII - Result Question 112
####109. Explain, “orthophosphoric acid, $H _3 PO _4$ is tribasic but phosphorous acid, $H _3 PO _3$ is dibasic”.
$(1982,1 M)$
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Solution:
- Orthophosphoric acid $\left(H _3 PO _4\right)$ has three replaceable (acidic) hydrogen while orthophosphorus acid $\left(H _3 PO _3\right)$ has only two replaceable hydrogen.
orthophosphoric acid (it has three acidic $H$ )
