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Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 8:33 pm
by RichardValdez1L
Does Bronsted just tell you whether the atom is a hydrogen donor or accepter while the lewis tells you whether the atom is an electron donor or accepter? Or is there more to it than that?

Re: Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 8:39 pm
by Kara Justeson 1B
Yes, Bronstead Acid is a H+ donor, while a Bronstead base is a H+ acceptor. Lewis Acid acid accepts the electron pair while the Lewis base donates the electron pair. I think the difference is just in the way they define the exchange.

Re: Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 8:39 pm
by Chris Fults 1C
Bronsted defines an acid as a proton donor whereas Lewis defines an acid as an electron pair acceptor. Conversely to the Bronsted theory, a base is a proton acceptor and in Lewis theory, a base is an electron pair donor. Therefore, some molecules, which don’t possess protons, can be acids according to the Lewis theory.

Re: Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 8:43 pm
by 204917020
Brønsted acids are H+ donors while Brønsted bases are H+ acceptors.
Lewis acids accept an e- pair, Lewis bases donate an e- pair.

Re: Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 9:29 pm
by MinyoungHong_1L
I found this sentence from the textbook helpful in understanding the terminology behind Lewis acids being electron acceptors.

"A proton (H+) is an electron pair acceptor. It is therefore a Lewis acid because it can attach to ("accept") a lone pair of electrons on a Lewis base" (p.467)

Re: Bronsted vs Lewis Acids and Bases

Posted: Sun Jun 10, 2018 9:34 pm
by Alejandro Salazar 1D
Arrhenius Acid is a compound that releases hydrogen ions in water
Arrhenius Base is a compound that releases hydroxide ions in water

Lewis Acid: is a species that ACCEPTS an electron pair
Lewis Base is a species that DONATES an electron pair

Bronsted acid is a proton donor and donates a hydrogen ion
Bronsted Base is a proton acceptor and accepts a hydrogen ion