Different from Bronsted and Conjugate

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Different from Bronsted and Conjugate

What is the different from Bronsted Acis&Bases and Conjugate Acids&Bases?

Chem_Mod
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Re: Different from Bronsted and Conjugate

The Bronsted-Lowry acid/base definition defines acids as proton donors and bases as proton acceptors. A conjugate acid/base refers to the compound formed after an acid-base reaction. For example, in the generic reaction:

$HA + B^- \rightleftharpoons HB + A^-$

where HA is the acid, B- is the base, HB is the protoned base, and A- is the acid after the proton transfer. Since the acid (HA) released a proton, it became A-, which is basic since it can now accept a proton. This means that A- is HA's conjugate base. Similarly, since the base (B-) accepted a proton to form HB, HB is now an acidic since it has a proton to release. This means that HB is B-'s conjugate acid.

Michael Cheng 1C
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Re: Different from Bronsted and Conjugate

Is there a difference between Conjugate Bronsted acid/base and Conjugate Lewis acid/base?

Ella Bouris
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Joined: Thu Jul 27, 2017 3:01 am

Re: Different from Bronsted and Conjugate

There shouldn't be a difference I think- it's more the context of the problem. If you define something using the Bronsted definition, that carries through the entire problem so a Bronsted acid would have a Bronsted base, and same with a Lewis acid.