Bronsted vs Lewis

[Gisela F Ramirez 2H]

What is the difference between a Bronsted Acid and a Lewis Acid? A Bronsted Base and a Lewis Base?

[Diviya Khullar 1G]

The Bronsted definitions of acids and bases relate to the protons. So a Bronsted acid is a proton donor and a Bronsted base is a proton acceptor. The Lewis definitions of acids and bases relate to the electrons. A Lewis acid is an electron acceptor and a Lewis base is an electron donor.

[Timothy_Yueh_4L]

A bronsted acid is a proton donor and a lewis acid is an electron acceptor. A bronsted base a proton acceptor and a lewis base is an electron donor.

[rkang00]

Then can an acid/base be considered Bronsted AND Lewis at the same time?

[Lily Benitez 2G]

Bases and acids can be considered to fit in the Lewis and bronsted definition but not all fall in to this category. For example, "the HF molecule as a whole cannot be considered an electron acceptor as there is no room for more electrons,so HF first dissociates and then the H accepts the electron. But the Bronsted base is OH-, which is the Lewis base. It donates electrons".