How does a stable conjugate base increase acidity?

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Christine Lin 1H
Posts: 108
Joined: Fri Sep 24, 2021 5:24 am

How does a stable conjugate base increase acidity?

Postby Christine Lin 1H » Thu Dec 02, 2021 11:23 am

I'm having trouble fully and conceptually understanding how a more stable conjugate base will increase acidity.

What do we mean when we say a conjugate base is stable? Is it simply that it's less likely to pair with H+ ions and revert back to the strong acid?

Aaron Martinez
Posts: 86
Joined: Fri Sep 24, 2021 6:54 am

Re: How does a stable conjugate base increase acidity?

Postby Aaron Martinez » Thu Dec 02, 2021 12:48 pm

A stable conjugate base means that the base formed by the acid giving away its proton will not want to attract the proton back. Its structure and electrons are arranged in a way that does not need the hydrogen. This means that the conjugate base will be less likely to attract a hydrogen back from the H30+ ion, which means that the H3O+ concentration will stay high.

Angela Denvir 1H
Posts: 91
Joined: Fri Sep 24, 2021 7:29 am

Re: How does a stable conjugate base increase acidity?

Postby Angela Denvir 1H » Thu Dec 02, 2021 12:51 pm

Hi there!

When the conjugate base is more stable, the reaction leans more towards the right, where the conjugate base lies. Because the ionized form is more stable, a greater concentration of the species will be in the ionized form and therefore, more acidic. Hope this helps!

Aida Fraser 2I
Posts: 61
Joined: Fri Sep 24, 2021 5:32 am

Re: How does a stable conjugate base increase acidity?

Postby Aida Fraser 2I » Thu Dec 02, 2021 1:58 pm

Why is a conjugate base that experiences resonance / delocalization more stable and therefore makes something more acidic?

Aida Fraser 2I
Posts: 61
Joined: Fri Sep 24, 2021 5:32 am

Re: How does a stable conjugate base increase acidity?

Postby Aida Fraser 2I » Sat Dec 04, 2021 9:48 pm

how do you know if a conjugate base is stable?

Aida Fraser 2I
Posts: 61
Joined: Fri Sep 24, 2021 5:32 am

Re: How does a stable conjugate base increase acidity?

Postby Aida Fraser 2I » Sat Dec 04, 2021 9:52 pm

can someone explain why the weaker an acid, the stronger is its conjugate base; the stronger an acid, the weaker is its conjugate base.


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