Relationship between pKa, pKb, and acidity strength?

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Qilan Li 4I
Posts: 54
Joined: Mon Jun 17, 2019 7:23 am

Relationship between pKa, pKb, and acidity strength?

Postby Qilan Li 4I » Sat Dec 07, 2019 4:03 pm

I am confused about the concept of pKa, pKw, and pKb. What exactly are they and what is their relationship to each other? What type of calculations are involved?

MinuChoi
Posts: 100
Joined: Wed Sep 18, 2019 12:15 am

Re: Relationship between pKa, pKb, and acidity strength?

Postby MinuChoi » Sat Dec 07, 2019 4:15 pm

pK = -logK. K is an equilibrium constant (Ka for acids, Kb for bases)
pKw = 14.
pKa + pKb = pKw
Stronger acids have a higher Ka value and a lower pKa value. Same goes for bases and Kb.


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