how to identify lewis acids

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Giovanni Anguiano-Gutierrez 3L
Posts: 52
Joined: Thu Jul 25, 2019 12:17 am

how to identify lewis acids

Postby Giovanni Anguiano-Gutierrez 3L » Sat Dec 07, 2019 11:23 pm

I get confused when trying to identify lewis acids. I know that the acid accepts electrons and the base donates electrons, but then I get confused because I don't know how it's actually working? if that makes sense? For bronsted, I feel like it's much simpler.

Kaylee Sepulveda 4G
Posts: 100
Joined: Thu Jul 11, 2019 12:16 am

Re: how to identify lewis acids

Postby Kaylee Sepulveda 4G » Sat Dec 07, 2019 11:27 pm

Hopefully this example will help:

The boron atom in boron trifluoride, BF3, only has six valence electrons. Since it does not have a complete octet, BF3 is a Lewis acid and reacts with many Lewis bases. In this case, a fluoride ion acts as the Lewis base and donates one of its lone pairs.

lewis acid.jpg

Giovanni Anguiano-Gutierrez 3L
Posts: 52
Joined: Thu Jul 25, 2019 12:17 am

Re: how to identify lewis acids

Postby Giovanni Anguiano-Gutierrez 3L » Sat Dec 07, 2019 11:40 pm

This makes more sense! Does a lewis acid always have an incomplete octet?

kendal mccarthy
Posts: 109
Joined: Wed Nov 14, 2018 12:22 am

Re: how to identify lewis acids

Postby kendal mccarthy » Sun Dec 08, 2019 1:12 am

A lewis acid is anything that is able to take in a lone electron pair. Usually it has a positive charge or can be a expanded octet.


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