pKA values

Acidity
Basicity
The Conjugate Seesaw

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

pKA values

Postby Celine 1F » Sat Dec 07, 2019 4:48 pm

what is pKA and why is it important

Malia Shitabata 1F
Posts: 127
Joined: Sat Aug 17, 2019 12:17 am

Re: pKA values

Postby Malia Shitabata 1F » Sat Dec 07, 2019 5:55 pm

pKa = -log[Ka] and it's the weak acid equilibrium constant. It's important to know so you can determine which acid is stronger/weaker when given its value. Ka and pKa have an inverse relationship. So a strong acid would have a high Ka value but a low pKa value. Conversely, a weak acid would have a low Ka value but a high pKa value.

Ryan Juncker 3D
Posts: 51
Joined: Wed Sep 18, 2019 12:18 am

Re: pKA values

Postby Ryan Juncker 3D » Sat Dec 07, 2019 6:02 pm

The biggest thing we need to know for chem 14A I believe is that a higher KA is a stronger acid, while a lower pKA is a stronger acid.

AmyL_3L
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

Re: pKA values

Postby AmyL_3L » Sat Dec 07, 2019 8:41 pm

pKa is the negative log of Ka, the acid dissociation constant. Lower the pKa, the stronger the acid, and vice versa.

Brian J Cheng 1I
Posts: 115
Joined: Thu Jul 11, 2019 12:15 am

Re: pKA values

Postby Brian J Cheng 1I » Sat Dec 07, 2019 8:43 pm

pKa is the negative log of the Ka value. Right now it's used in comparing acid strength as many have stated above.


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