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pka and ka

Posted: Sun Dec 08, 2019 9:45 pm
by 405404782 Gabriel Rigole 4F
What exactly are pKa and Ka and what are they used?

Re: pka and ka

Posted: Sun Dec 08, 2019 9:49 pm
by Ariana Iranmahboub1G
Ka is the acid dissociation constant and is used for weak acids and pka is the -log(Ka).

Re: pka and ka

Posted: Sun Dec 08, 2019 9:54 pm
by Kimberly Koo 2I
Both pKa and Ka are used for determining how acidic a molecule is

Re: pka and ka

Posted: Sun Dec 08, 2019 9:56 pm
by Jared_Yuge
Ka is the concentration of the product over the concentration of the reactant.

Re: pka and ka

Posted: Mon Dec 09, 2019 3:18 am
by Serena Siddiq 3D
Since kA represents the amount of H+ concentration at equilibrium for weak acids, it will be high if the acid has a high H+ and vice versa. The pkA is inversely related to this as it is the -log of this number (hence p in front) and would be lower if the weak acid was on the stronger side and vice versa. Therefore, stronger weak acid equals higher kA and lower pkA, weaker weak acid equals lower kA and higher pkA.