identifying acids and bases

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halle young 4A
Posts: 68
Joined: Thu Jul 11, 2019 12:16 am

identifying acids and bases

Postby halle young 4A » Fri Nov 29, 2019 11:03 am

How can you tell if a compound is a lewis acid or a lewis base while looking at its structure. for example, why is SO2 considered a lewis acid?

Jamie Lee 1H
Posts: 54
Joined: Fri Aug 09, 2019 12:15 am

Re: identifying acids and bases

Postby Jamie Lee 1H » Fri Nov 29, 2019 1:39 pm

You have to look at the equation as a whole or have it somewhat memorized. By looking at the whole equation, you identify which reactant is the electron donor which means it gains the hydrogen and that would be your lewis base. Then the other reactant has to be an electron acceptor and lose a hydrogen which makes it the Lewis base.

Emma Popescu 1L
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am

Re: identifying acids and bases

Postby Emma Popescu 1L » Fri Nov 29, 2019 9:37 pm

By drawing out the lewis structures, you can see the electron arrangement around the atom. If the atom can donate an electron pair (for example has lone pairs) then it is a lewis base. If the atom is likely to gain electrons, then it is a lewis acid.

Adam Kramer 1A
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: identifying acids and bases

Postby Adam Kramer 1A » Sun Dec 01, 2019 10:22 am

Like the reply above, you can look at the structure, but for the bronsted definition of acid or base, you would look to see if the structure is likely to donate a proton, or a hydrogen ion. This would make it a bronsted acid. If it were to be able to accept a proton, or hydrogen ion, it would be a bronsted base.

Alison Trinh 1E
Posts: 104
Joined: Thu Jul 25, 2019 12:16 am

Re: identifying acids and bases

Postby Alison Trinh 1E » Sun Dec 01, 2019 11:50 pm

An acid is considered a Lewis acid if an electron pair can be accepted. A Lewis base would be considered an electron pair donor.

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