Bronsted acid

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melissa_dis4K
Posts: 106
Joined: Fri Sep 28, 2018 12:28 am

Bronsted acid

Postby melissa_dis4K » Sat Dec 08, 2018 10:55 am

Why is HBr a bronsted acid?

Ashish Verma 2I
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

Re: Bronsted acid

Postby Ashish Verma 2I » Sun Dec 09, 2018 12:47 am

Because it donates a proton to become a stable anion (Br-)

josephperez_2C
Posts: 70
Joined: Wed Nov 15, 2017 3:04 am

Re: Bronsted acid

Postby josephperez_2C » Sun Dec 09, 2018 1:37 am

It is a strong acid because it loses an H+. It's equation of dissociation is HBr(aq) -> H+(aq) + Br-(aq).

Manas_Varma_4B
Posts: 30
Joined: Fri Sep 28, 2018 12:29 am

Re: Bronsted acid

Postby Manas_Varma_4B » Sun Dec 09, 2018 2:27 pm

It's a strong acid because it completely disassociates by losing its one proton, H+.

timschaeffer Dis 1J
Posts: 38
Joined: Fri Sep 28, 2018 12:18 am

Re: Bronsted acid

Postby timschaeffer Dis 1J » Sun Dec 09, 2018 6:19 pm

You can tell that Hbr is especially strong because Br is a halogen, meaning that it already wants to shed a hydrogen proton so it can gain an electron and become isoelectric with krypton. Br also has a relatively low electronegativity compared to other halogens like fluorine, so it holds less tightly onto the hydrogen (which it already wants to get rid of). Both of these factors combine to result in a compound (HBr) that readily gives off a proton in solution and does not want to return to its original state, classifying it as a strong acid.


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