Ka vs pKa

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905574994
Posts: 107
Joined: Fri Sep 24, 2021 7:26 am

Ka vs pKa

Postby 905574994 » Wed Dec 01, 2021 11:02 am

Hey guys,

Could someone please explain the difference between pKa and Ka?

Thanks
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Cadence Chang
Posts: 135
Joined: Fri Sep 24, 2021 6:05 am
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Re: Ka vs pKa

Postby Cadence Chang » Wed Dec 01, 2021 11:09 am

Hi there!
pKa = -log(Ka)
pKa is used for weak acids.
Hope this helps! :)
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Reagan Feldman 1D
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Re: Ka vs pKa

Postby Reagan Feldman 1D » Wed Dec 01, 2021 11:38 am

Ka is the equilibrium constant of an acid (aka acid dissociation constant). pKa is the -log of that constant. Since strong acids are completely dissociated, they do not have Ka values; they are just assumed to be very large values.
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