Classify each of the following as a Lewis acid or a Lewis ba

Classify each of the following as a Lewis acid or a Lewis base.

Solution

All cations are lewis acids

A molecules central atom contains in complete octet are lewis acids

multiple bonds between atoms of dissimilar electronegativities are lewis acids

All anions are lewis bases

A molecules central atom contains lone pair of electrons are lewis bases

Lewis acids                                                                          Lewis bases

AlCl3, Fe^2+,CO2                                                           OH^- , NH3, Br^- , CO