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How to Identify Lewis acid and Bases

Posted: Tue Dec 04, 2018 12:57 pm
by Ashley Odibo Dis3E
In reviewing for the final I'm trying to figure out easy ways to remember concepts. So can somebody correct me on whether or not the following concept is correct? When identifying Lewis acids and bases, are the acids typically the molecules without lone pairs on the central atoms while bases are molecules with lone pairs on the central atom, and if not can you give an example of why this concept doesn't work. Also if this concept isn't correct, what is another way to distinguish between Lewis acids and bases when given a molecule? Thanks.

Re: How to Identify Lewis acid and Bases

Posted: Tue Dec 04, 2018 1:01 pm
by Saachi_Kotia_4E
From what I understand, this is correct. Lewis bases have lone pairs that they are able to donate to a bond, while the acids have room to accept that electron pair. I found this online: "A Lewis acid is a chemical species that contains an empty orbital which is capable of accepting an electron pair from a Lewis base. A Lewis base, then, is any species that has a filled orbital containing an electron pair which is not involved in bonding but may form a bond with a Lewis acid."

Re: How to Identify Lewis acid and Bases

Posted: Wed Dec 05, 2018 11:06 pm
by Ashley P 4I
You two are life savers, thank you for simplifying this. Lone Pairs= Base No lone pairs= Acid

Re: How to Identify Lewis acid and Bases

Posted: Fri Dec 07, 2018 1:10 pm
by Madelyn Romberg 3L
Also helpful is to remember Lewis Acids will accept lone pairs and Lewis Bases with donate lone pairs, hence your conclusion was correct

Re: How to Identify Lewis acid and Bases

Posted: Sat Dec 08, 2018 7:59 pm
by allisoncarr1i
Ashley P 4I wrote:You two are life savers, thank you for simplifying this. Lone Pairs= Base No lone pairs= Acid

Are there any exceptions for this or is it pretty reliable as a quick way to determine whether it is a base or acid?