Defining brosted and lewis

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Elyssa Smith 4B
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Joined: Wed Sep 18, 2019 12:22 am

Defining brosted and lewis

Postby Elyssa Smith 4B » Mon Dec 02, 2019 5:25 pm

So all Lewis acids are Bronsted acids but not all Bronsted acids are Lewis acids?

Kate Osborne 1H
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Joined: Fri Aug 30, 2019 12:16 am

Re: Defining brosted and lewis

Postby Kate Osborne 1H » Mon Dec 02, 2019 5:29 pm

It should be the reverse. The definition of a Lewis acid/base is more general than Bronstead acid/base.

Aprice_1J
Posts: 55
Joined: Wed Sep 18, 2019 12:16 am

Re: Defining brosted and lewis

Postby Aprice_1J » Mon Dec 02, 2019 6:41 pm

I understand the definition of Bronsted and Lewis acids and bases but how do you identify if an acid or base is Lewis or Bronsted when it is in a reaction? Does this determine how you then deal with the reaction.

Melvin Reputana 1L
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Joined: Sat Aug 17, 2019 12:16 am

Re: Defining brosted and lewis

Postby Melvin Reputana 1L » Mon Dec 02, 2019 11:52 pm

In terms of the Lewis definition, the proton is an acid. On the other hand, according to the Bronsted-Lowry definition, the compound that donates the proton is the acid. For both definitions, the base is the compound that accepts a proton.

Elizabeth Harty 1A
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Joined: Sat Jul 20, 2019 12:16 am

Re: Defining brosted and lewis

Postby Elizabeth Harty 1A » Tue Dec 03, 2019 8:28 am

Aprice_1J wrote:I understand the definition of Bronsted and Lewis acids and bases but how do you identify if an acid or base is Lewis or Bronsted when it is in a reaction? Does this determine how you then deal with the reaction.


In the reaction, the one giving off a proton is the acid and the one reacting with that compound is the base. In turn the compound that the acid is transformed into is the conjugate base and the compound that the base is transformed into is the Lewis acid.

Jasmine Fendi 1D
Posts: 108
Joined: Sat Aug 24, 2019 12:15 am

Re: Defining brosted and lewis

Postby Jasmine Fendi 1D » Tue Dec 03, 2019 8:33 am

Adding to the comments above,
bronsted base: proton acceptor
bronsted acid: proton donor
lewis base: electron pair donor
lewis acid: electron pair acceptor
I would identify them by focusing on what is being transferred or changed in the reaction.


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