Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid`//`base:
a. `overset(Θ)(O)H, b. F^(Θ), c. H^(o+), d. BCl_(3)`

Explanation

(a) Hydroxyl ion is a Lewis base as it can donate an electron lone pair `(":OH^(-))`,
(b) Flouride ion acts as a Lewis base as it can donate any one of its four electron lone pairs.
(c ) A proton is a Lewis acid as it can accept a lone pair of electrons from bases like hydroxyl ion and flouride ion.
(d) `BCl_(3)` acts as a Lewis acid as it can accept a lone pair of electrons from species like ammonia or amine molecules.