Acids and Bases pka and pkb

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CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

Acids and Bases pka and pkb

Postby CNourian2H » Wed Jan 22, 2020 3:56 pm

Can someone explain the relation btwn pkA/pkB and how strong the acid/base is. If I have a higher pkB, does that mean I have a weaker base?

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

Re: Acids and Bases pka and pkb

Postby Hui Qiao Wu 1I » Wed Jan 22, 2020 4:00 pm

The lower the pKb, the stronger the base. The lower the pKa, the stronger the acid.

Abhi Vempati 2H
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Acids and Bases pka and pkb

Postby Abhi Vempati 2H » Wed Jan 22, 2020 4:04 pm

Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!

Mariah
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Joined: Fri Aug 02, 2019 12:16 am

Re: Acids and Bases pka and pkb

Postby Mariah » Wed Jan 22, 2020 4:12 pm

Abhi Vempati 2H wrote:Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!


14 is the same as p[sub]w right?

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

Re: Acids and Bases pka and pkb

Postby CNourian2H » Thu Jan 23, 2020 2:18 am

Mariah wrote:
Abhi Vempati 2H wrote:Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!


14 is the same as p[sub]w right?


Yes, Pkw=14

Celine 1F
Posts: 120
Joined: Fri Aug 02, 2019 12:16 am

Re: Acids and Bases pka and pkb

Postby Celine 1F » Thu Jan 23, 2020 10:19 am

The lower the pKa, the stronger the acid. The lower the pKb, the stronger the base!

Simon Dionson 4I
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Joined: Sat Sep 14, 2019 12:17 am

Re: Acids and Bases pka and pkb

Postby Simon Dionson 4I » Thu Jan 23, 2020 1:07 pm

the -log means that the higher the number, the lower the value. Higher numbers result in stronger acids/bases for pka and pkb.

ValerieChavarin 4F
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Joined: Wed Sep 18, 2019 12:18 am

Re: Acids and Bases pka and pkb

Postby ValerieChavarin 4F » Thu Jan 23, 2020 2:31 pm

A lower pKa indicates a stronger acid and a lower pKb is a stronger base, as pKa + pKb = 14

Nawal Dandachi 1G
Posts: 102
Joined: Sat Sep 28, 2019 12:16 am

Re: Acids and Bases pka and pkb

Postby Nawal Dandachi 1G » Thu Jan 23, 2020 2:40 pm

a low pKa would indicate a strong acid whereas a low pKb would indicate a strong base


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