Difference between Bronsted and Lewis Acids

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EllaBerry
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Difference between Bronsted and Lewis Acids

Postby EllaBerry » Wed Dec 05, 2018 12:52 pm

Can an acid be both a Bronsted and a Lewis acid at the same time? If so, when are they not?

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Difference between Bronsted and Lewis Acids

Postby Tarika Gujral 1K » Wed Dec 05, 2018 1:22 pm

Bronsted acids are more specific than Lewis acids. Bronsted acids are compounds that can donate a proton, where Lewis acids are electron pair acceptors. So all Bronsted acids are Lewis acids, but not all Lewis acids are Bronsted acids.

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Difference between Bronsted and Lewis Acids

Postby Kayla Vo 1B » Wed Dec 05, 2018 1:28 pm

A Bronsted acid is a proton (H+) donor and a Bronsted base is a proton acceptor. A Lewis acid is an electron acceptor while a Lewis base is an electron donor. Because the Bronsted definitions restricts acids to be H+ donors, ions like Al 3+ (which are Lewis acids since they can accept electrons) are not necessarily considered to be an acid based on the Bronsted definition. The Lewis definition as a result is more inclusive compared to the Bronsted definition.


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