How do I identify if a molecule is a Bronsted Acid or Base?

Moderators: Chem_Mod, Chem_Admin

JasonNovik3A
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

How do I identify if a molecule is a Bronsted Acid or Base?

Postby JasonNovik3A » Sun Dec 03, 2017 5:15 pm

Some examples H2CO3 or NH3 ... how do I figure out of these are Acids or Bases?

Taylor 1F
Posts: 17
Joined: Thu Jul 27, 2017 3:00 am

Re: How do I identify if a molecule is a Bronsted Acid or Base?

Postby Taylor 1F » Sun Dec 03, 2017 5:33 pm

The acid of a compound in Bronsted's definition:is the proton giver. While the base of the compound the proton acceptor. But most compounds are consistent so you just have to know that carbonic acid is an acid and like NH3 is usually a base.

Bansi Amin 1D
Posts: 51
Joined: Fri Sep 29, 2017 7:05 am
Been upvoted: 1 time

Re: How do I identify if a molecule is a Bronsted Acid or Base?

Postby Bansi Amin 1D » Sun Dec 03, 2017 5:34 pm

In the balanced equation, check if the amount of hydrogens increased or decreased. If there was a decrease, that means that the molecule donated the protons (in the form of the hydrogen) and is then a Brønsted acid and if the amount of the hydrogens increased then the molecule accepted the protons and is a Brønsted base.

Tanaisha Italia 1B
Posts: 55
Joined: Fri Sep 29, 2017 7:04 am

Re: How do I identify if a molecule is a Bronsted Acid or Base?

Postby Tanaisha Italia 1B » Sun Dec 03, 2017 6:02 pm

Another way to think of it is that the N atom in NH3 has a lone pair of electrons so it is an electron donor, which makes it a Lewis base. This also means that it is a proton acceptor and a Bronsted base. H2CO3 is the formula for carbonic acid, so that would be a Bronsted acid.

404995677
Posts: 82
Joined: Fri Sep 29, 2017 7:07 am

Re: How do I identify if a molecule is a Bronsted Acid or Base?

Postby 404995677 » Sun Dec 03, 2017 10:07 pm

whats the difference between a Lewis acid/base and a Bronsted acid/ base?

JonathanLam1G
Posts: 25
Joined: Fri Sep 29, 2017 7:04 am

Re: How do I identify if a molecule is a Bronsted Acid or Base?

Postby JonathanLam1G » Sun Dec 03, 2017 10:33 pm

Keliana Hui 3H wrote:whats the difference between a Lewis acid/base and a Bronsted acid/ base?


Lewis acids/bases involve donating/accepting an electron, while Bronsted acids/bases involve donating/accepting H+ ions a.k.a. protons.


Return to “Bronsted Acids & Bases”

Who is online

Users browsing this forum: No registered users and 1 guest