Ka and Kb

Acidity
Basicity
The Conjugate Seesaw

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Malia Shitabata 1F
Posts: 109
Joined: Sat Aug 17, 2019 12:17 am

Ka and Kb

Postby Malia Shitabata 1F » Wed Dec 04, 2019 9:45 pm

For polyprotic acids, Ka1 is always greater than Ka2 and the first step is always the stronger acid. Does the same go for Kb? Would Kb1 be greater than Kb2 and the first step indicate the stronger base?

Ryan 1K
Posts: 75
Joined: Fri Aug 09, 2019 12:15 am

Re: Ka and Kb

Postby Ryan 1K » Wed Dec 04, 2019 10:40 pm

Yes I would assume so since polyprotic bases and Kb values act similar to acids other than accepting protons. Although it is in reverse, polyprotic bases would accept protons less and less readily the more protons they gain.

Kennedi2J
Posts: 81
Joined: Wed Sep 18, 2019 12:20 am

Re: Ka and Kb

Postby Kennedi2J » Thu Dec 05, 2019 2:59 am

Is there any examples of this in the textbook? It would make more sense if I saw problem related to this topic

Ryan 1K
Posts: 75
Joined: Fri Aug 09, 2019 12:15 am

Re: Ka and Kb

Postby Ryan 1K » Sat Dec 07, 2019 12:58 am

No, I don't think the book goes into detail about bases that accept multiple protons, but it should be the same as polyprotic acids, only in reverse order. The same trends apply.


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