# How do Lewis acids and bases differ from other acids and bases?

Mar 6, 2017

$\text{Lewis acids and bases}$ do not necessarily exchange hydronium ions in aqueous (or other) solutions.............

#### Explanation:

$\text{Lewis acids and bases}$ ACCEPT, and DONATE electron density, conceived to be in the form of a pair of electrons.

$A l C {l}_{3} \left(a q\right) + C {l}^{-} \rightarrow A l C {l}_{4}^{-}$

In terms of the definition, which is the Lewis acid, and which is the Lewis base in the given reaction. Of course, $A l C {l}_{4}^{-}$ is a Lewis acid-base adduct.

We can draw on another example:

NMe_3 + BMe_3 rarr Me_3N^(+)-""^(-)BMe_3

Which is the Lewis-acid, and which is the base?