What does a conjugate acid/base do?  [ENDORSED]

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Jineava_To_3N
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What does a conjugate acid/base do?

Postby Jineava_To_3N » Sun Nov 20, 2016 8:23 pm

I understand that in a equation, acid+base<->conjugate acid+conjugate base, the acid by the Bronsted definition, donates a proton to the base, but what does the conjugate bases or conjugate acids do? Do they follow the Lewis or Bronsted definitions of an acid or base? I can't see the relationship.

Emerald Ellspermann 1K
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Re: What does a conjugate acid/base do?  [ENDORSED]

Postby Emerald Ellspermann 1K » Mon Nov 21, 2016 8:09 am

The conjugate base is the compound formed once the acid donates a proton. A conjugate acid would be formed when a base accepts a proton.

Julia Hwang 3G
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Joined: Wed Sep 21, 2016 3:00 pm

Re: What does a conjugate acid/base do?

Postby Julia Hwang 3G » Tue Nov 22, 2016 1:42 pm

This also confused me a little, but reading the textbook helped clarify. In the example of HCO3- + O2-, HCO3- loses its H and donates it to O2- so it becomes OH- and HCO3- becomes CO3-. HCO3- is the Bronsted acid because it donated a proton, and O2- is the Bronsted base because it accepted a proton. CO3- is left after this Bronsted acid donates the H, which is the definition of the conjugate base. OH- is what remains after O2- accepts the proton, making it the conjugate acid. They're what's formed by the Bronsted acids and bases, so they're products of the acid and base reaction. The terminology is a little confusing at first but if you understand what's actually happening in the reaction then it makes a lot more sense. Hope this helps!

AnnaTong1E
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Joined: Fri Jul 15, 2016 3:00 am

Re: What does a conjugate acid/base do?

Postby AnnaTong1E » Wed Nov 30, 2016 5:18 pm

Do the conjugate acids and bases have any function other than being the things that form when acids donate protons and bases accept them?

Wenqian_Deng_1L
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Re: What does a conjugate acid/base do?

Postby Wenqian_Deng_1L » Sun Dec 04, 2016 9:23 pm

No I don't think so. However, usually when there's a strong conjugate acid/base, the "second step" of the equation involves the conjugate acid/base to take a proton from water and reform into it's original base/acid, and making the solution either basic or acidic.


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