Definition

Moderators: Chem_Mod, Chem_Admin

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Definition

Postby PranaviKolla2B » Mon Nov 25, 2019 12:28 pm

What is the difference between a Bronsted acid and a Lewis acid?

sarahforman_Dis2I
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: Definition

Postby sarahforman_Dis2I » Mon Nov 25, 2019 12:33 pm

PranaviKolla3G wrote:What is the difference between a Bronsted acid and a Lewis acid?


A Bronsted acid gives away a proton. A Lewis acid accepts a pair of electrons. If you think of a H+ ion, the H+ ion is a proton and therefore can donate a proton (Bronsted acid). Since it has a positive charge, it can accept electron pairs as well (lewis acid). Hope this helps!

Sanjana K - 2F
Posts: 102
Joined: Sat Sep 07, 2019 12:17 am
Been upvoted: 1 time

Re: Definition

Postby Sanjana K - 2F » Tue Nov 26, 2019 2:19 pm

In addition to the previous answer, you can look at the following examples:

- Acetic acid (CH3COOH) is a Bronsted acid because it donates a hydrogen atom to water -- it's a proton donor basically, so you're left with CH3COO- (the conjugate base). And in this case, water would be the Bronsted base because it accepts the hydrogen/proton and becomes H30+ (the conjugate aid).
- Boron trifluoride (BF3) is a Lewis acid because it can accept electron pairs due to the B atom having an unfilled valence shell. So when BF3 reacts with a Lewis base (like NH3 for instance), the product will be a Lewis acid-Lewis base complex (in this case, F3BNH3)

Michelle Xie 2B
Posts: 99
Joined: Sat Aug 17, 2019 12:18 am

Re: Definition

Postby Michelle Xie 2B » Tue Nov 26, 2019 6:20 pm

A bronsted acid is one that can give up a proton. A lewis acid is one that can accept a pair of electrons.

Daniel Toscano 1L
Posts: 95
Joined: Tue Nov 13, 2018 12:18 am

Re: Definition

Postby Daniel Toscano 1L » Tue Nov 26, 2019 6:54 pm

A bronsted acid donates a proton
A lewis acid accepts an electron pair
A bronsted base accepts a proton
A lewis base donates an electron pair

Eva Zhao 4I
Posts: 101
Joined: Sun Sep 29, 2019 12:16 am

Re: Definition

Postby Eva Zhao 4I » Wed Nov 27, 2019 12:33 pm

A Bronsted acid is a proton donor (i.e. HCl, HBr), while a Lewis acid is an electron acceptor (i.e. BF3, H+).


Return to “Bronsted Acids & Bases”

Who is online

Users browsing this forum: No registered users and 1 guest