Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base
Question:

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) $\mathrm{OH}^{-}$(b) $\mathrm{F}^{-}$(c) $\mathrm{H}^{+}$(d) $\mathrm{BCl}_{3}$.

Solution:

(a) $\mathrm{OH}^{-}$is a Lewis base since it can donate its lone pair of electrons.

(b) $\mathrm{F}^{-}$is a Lewis base since it can donate a pair of electrons.

(c) $\mathrm{H}^{+}$is a Lewis acid since it can accept a pair of electrons.

(d) $\mathrm{BCl}_{3}$ is a Lewis acid since it can accept a pair of electrons.