using Ka and Pka

The Conjugate Seesaw

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Annie Ye
Posts: 106
Joined: Wed Sep 18, 2019 12:22 am

using Ka and Pka

Postby Annie Ye » Thu Dec 05, 2019 1:25 pm

What do we use Ka and Pka for? What do they represent?

Kallista McCarty 1C
Posts: 212
Joined: Wed Sep 18, 2019 12:18 am

Re: using Ka and Pka

Postby Kallista McCarty 1C » Thu Dec 05, 2019 1:27 pm

You will be given a Ka or pKa for weak acids. You'll get a Kb or pKb for weak bases! You use them to compare their relative strengths to one another.

andrewcj 2C
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: using Ka and Pka

Postby andrewcj 2C » Thu Dec 05, 2019 2:04 pm

i think for 14A, you only need to know how to calculate those values. In 14B, you can use those values in calculations and potentially get other values such as pH from Ka and pKa, but for now you don't need to worry about that.

Catherine Daye 1L
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: using Ka and Pka

Postby Catherine Daye 1L » Thu Dec 05, 2019 2:11 pm

Ka is the dissociation constant and it shows how easily acids dissociate ([H+][anion]/[H-A]). The higher the Ka, the stronger the acid. PKa = -log[Ka]. The higher the PKa, the weaker the acid.

Ashley Kumar 3F
Posts: 50
Joined: Sat Sep 07, 2019 12:18 am

Re: using Ka and Pka

Postby Ashley Kumar 3F » Thu Dec 05, 2019 2:40 pm

pKa and Ka are used to help determine which acid is stronger than the other. They are called the dissociation constant

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