Lewis vs Bronsted

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Keon Amirazodi 3H
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Lewis vs Bronsted

Postby Keon Amirazodi 3H » Tue Dec 15, 2020 6:57 pm

What is the difference between Lewis acids and bases compared to Bronsted acids and bases?

Faith Veenker 2K
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Re: Lewis vs Bronsted

Postby Faith Veenker 2K » Tue Dec 15, 2020 7:21 pm

The definition for a Lewis acid/base is more general than for a Bronsted acid/base.
Lewis acids and bases are only defined by the electron pairs being donated/accepted (bases give lone pair, acids accept).
Bronsted acids and bases must have an H+ involved (bases accept H+, acids donate H+).
So, all Bronsted acids/bases are Lewis acids/bases but not all Lewis acids/bases are Bronsted acids/bases.

305405193
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Re: Lewis vs Bronsted

Postby 305405193 » Tue Dec 15, 2020 8:08 pm

is finding the conjugate acids and bases different for each type of acid and base based on whether they are lewis or not?

John_Tran_3J
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Re: Lewis vs Bronsted

Postby John_Tran_3J » Tue Dec 15, 2020 8:11 pm

Bronsted A/B relate to specifically hydrogen donors/acceptors and Lewis A/B relate to lone pair donors/acceptors

Lizbeth Garcia 1F
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Re: Lewis vs Bronsted

Postby Lizbeth Garcia 1F » Tue Dec 15, 2020 9:47 pm

The Bronsted definition uses the donation and acceptance of protons while lewis uses the donation and acceptance of electron pairs

Yuehan_Wu_3K
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Re: Lewis vs Bronsted

Postby Yuehan_Wu_3K » Tue Dec 15, 2020 10:01 pm

Lewis acids accept electrons while bronsted acids donate protons.

Izamary Marquez 2H
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Re: Lewis vs Bronsted

Postby Izamary Marquez 2H » Tue Dec 15, 2020 10:03 pm

305405193 wrote:is finding the conjugate acids and bases different for each type of acid and base based on whether they are lewis or not?


I would say yes. There are definitely patterns you can turn to, but it really depends which molecules are interacting, so it's best to look at which molecule is donating and which is accepting the electrons based on the products that are given for the reaction.

Talia Leano 2H
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Re: Lewis vs Bronsted

Postby Talia Leano 2H » Tue Dec 15, 2020 10:37 pm

Lewis acid accepts electrons and lewis base donates electrons. Bronsted acid donates a proton and Bronsted base accepts a proton!

David Liu 1E
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Re: Lewis vs Bronsted

Postby David Liu 1E » Wed Dec 16, 2020 2:13 pm

lewis acids/bases focus on electrons, while bronsted focuses on the transfer of h+ ions

rita_debbaneh2G
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Re: Lewis vs Bronsted

Postby rita_debbaneh2G » Wed Dec 16, 2020 2:57 pm

A Bronsted acid is a hydrogen ion (proton) donor while a Lewis acid is an electron acceptor. A Bronsted base is a hydrogen ion (proton) acceptor while a Lewis base is an electron donor.

Keshav Patel 14B 2B
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Re: Lewis vs Bronsted

Postby Keshav Patel 14B 2B » Wed Dec 16, 2020 6:01 pm

The important difference between lewis and Bronsted is the definition. Lewis acid/base definition is based on the accepting or donating of pairs of electrons while Bronsted is based on the accepting and donating of a proton in the form of an H+ ion.

Grace_Remphrey_2J
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Re: Lewis vs Bronsted

Postby Grace_Remphrey_2J » Wed Dec 16, 2020 10:42 pm

Bronsted acids donate H+ ions. Bronsted bases accept H+ ions. Lewis acids accept an electron pair. Lewis bases donate an electron pair. Think: bronsted=H+ AND Lewis=electrons. Hope this helps a bit!

keely_bales_1f
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Re: Lewis vs Bronsted

Postby keely_bales_1f » Wed Dec 16, 2020 10:43 pm

As stated above, Lewis acids/bases have to deal with electrons whereas Bronsted acids/bases deal with H+ ions.

Ansh Patel 2I
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Re: Lewis vs Bronsted

Postby Ansh Patel 2I » Wed Dec 16, 2020 10:53 pm

Hi! Lewis acids and bases deal with accepting or donating electrons, respectively, while Bronsted acids and bases deal with donating and accepting H+, respectively.

Colin Squire 3B
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Re: Lewis vs Bronsted

Postby Colin Squire 3B » Wed Dec 16, 2020 11:16 pm

One way I like to remember what a Lewis acid is that it an electron pair acceptor (acid -> accepts). From that, I can determine that the base donates. Just by remembering the first one, I then know that Bronsted acids are the reverse of the Lewis acid-base. Bronsted acids donate, bases accept.

Jonathan Banh 1G
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Re: Lewis vs Bronsted

Postby Jonathan Banh 1G » Thu Dec 17, 2020 1:22 am

The criteria of Bronsted acids and bases is much more restrictive in terms of classification than that of Lewis acids and bases. Namely, Bronsted acids refer to species which donate protons in solution while Bronsted bases are considered to be species which accept protons. Here, protons are referring to H3O+ ions, or in simpler terms, H+ ions. On the other hand, in the more general definition of Lewis acids and bases, acids are substances which accept electron pairs while bases donate electron pairs.

Talia Dini - 3I
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Re: Lewis vs Bronsted

Postby Talia Dini - 3I » Thu Dec 17, 2020 1:40 am

A bronsted acid is a proton donor. A bronsted base is a proton acceptor. A lewis acid is a lone pair acceptor. A lewis base is a lone pair donor.

Adam_ElSayed_3B
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Re: Lewis vs Bronsted

Postby Adam_ElSayed_3B » Thu Dec 17, 2020 2:32 am

Think of it like an umbrella - Lewis bases' definition, using lone pairs, encompass more than the smaller umbrella of Bronsted.

Armen_Isayan_2L
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Re: Lewis vs Bronsted

Postby Armen_Isayan_2L » Thu Dec 17, 2020 2:52 am

Hello, the main difference between the Bronsted and Lewis acids and bases is that Bronsted acids donate protons and the Bronsted bases accept protons. On the other hand Lewis acids are electron pair acceptors and the Lewis base donates electrons.

Mina Tadros 3L
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Re: Lewis vs Bronsted

Postby Mina Tadros 3L » Thu Dec 17, 2020 2:57 am

Lewis acids and bases deal with electrons, whereas Bronsted acids and bases deal with protons. A Lewis acid is any atom that can accept a pair of electrons from a lewis base, forming a coordinate covalent bond. A Bronsted acid is a compound that is able to release a proton (H+). A Bronsted base is a compound that is able to accept a proton.

Brian Nguyen 2I
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Re: Lewis vs Bronsted

Postby Brian Nguyen 2I » Thu Dec 17, 2020 3:31 am

The Bronsted definition involves protons, where as the Lewis definition involves electron pairs. Lewis acids are electron pairs acceptors, whereas Lewis bases are electron pair donors. Bronsted acids are proton donors, whereas Bronsted bases are proton acceptors.


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