1.

Classifythe following species as Lewis acids and Lewis basesand show how these act as such : (a) HO^(-)(b) F^(-)(c) H^(+) (d) BCl_(3)

Answer»

Solution :(a) : `OH^(-)` (hydroxyl ion ) is a Lewis base as it can DONATE an electron pair.
(b) `:underset(..)overset(..)(F):^(-)` is a Lewis base as it has 4 lone pairs of ELECTRONS and can donate any one of these.
(c) `H^(+)` is a Lewis base as it can accept electron pair from BASES LIKE `OH^(-), F^(-) ` ion etc.
(d) `BCl_(3) ` is a Lewis acid as B is electron deficient (having only 6 electrons instead of complete octet). Hence, it can accept an electron pair from species like ammonia, amines etc.


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