1.

H_(3)BO_(3) acceptshydroxideionfromwatershownbelow, H_(3) BO_(3) (aq) + H_(2)O(l) -> B(OH)_(4)^(-)+ H^(+) Predictthe natureof H_(3)BO_(3) usingLewisconcept.

Answer»

Solution :Boricacidis alsocalledas hydrogenborateor orthoboricacid . ITIS aweakmonobasicLewisacidof borronandwrittenas `B(OH)_(4)` . Itacceptshydroxy`(OH^(-))` ION fromwater. Itdoesnotdissociateto givehydronium`H_(3) O^(+)` ion ratherformsionand thisions inturmgive`H_(3)O^(+)` ions
`B(OH)_(3)+ H_(2)O= (B(OH)_(4))^(-)= H_(3)O^(+)`
Henceit isconsideredas weakacid.


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