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Is boricacid a protic acid ? Explain . |
Answer» Solution :It is a not a protic acid since it does not ionize in `H_(2)O` to give a PROTON.  Insteadbecause of the small size ofboron andpresence of only six electrons inits valence shell, `B(OH)_(3)` accepts a lone pair of electrons from the oxygen atom of the `H_(2)O` MOLECULE to form a hydratedspecies.  The `+ve` charge on the O-atom in turn, pulls the `sigma`-electrons of the O-H bonds towards itself thereby facilitating the release of a proton. As a result , `B(OH)_(3)` acts as a weak MONOBASIC Lewis acid and thus reactswith `NAOH`SOLUTIONTO formsodiummetaborate. `B(OH)_(3) + NaOH rarr Na^(+)[B(OH)_(4)]^(-)` or `underset(" Sod. metaborate")(Na^(+)BO_(2)^(-))+2H_(2)O` |
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