pKa

Johnathan Smith 1D
Posts: 108
Joined: Wed Sep 11, 2019 12:16 am

pKa

What is pKa and how do we find it?

ishaa Diwakar 4E
Posts: 56
Joined: Wed Sep 11, 2019 12:17 am

Re: pKa

pKa is the -log[Ka]. Similarly to pH, it is a simplified way of writing concentration using the -log equation as an operator. We don't need to know how to calculate pKa for this class.

Ariana Iranmahboub1G
Posts: 114
Joined: Fri Aug 09, 2019 12:17 am

Re: pKa

pKa is used to measure how strong an acid is. It is measured by taking the negative log of Ka(the equilibrium constant). The smaller the pKa is, the stronger the acid.
Last edited by Ariana Iranmahboub1G on Sun Dec 01, 2019 8:52 pm, edited 1 time in total.

KDang_1D
Posts: 127
Joined: Fri Aug 30, 2019 12:15 am
Been upvoted: 1 time

Re: pKa

"p" means to take the -log of a value. Just as pH is the -log[H+], pKa is the -log(Ka).

For example, NH4+ has a Ka = 5.6x10^-10
pKa = -log(5.6x10^-10) = 9.25

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