Disassociation of Acids vs Their Conjugate Bases

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Jake Ney lecture 1 discussion 1F
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Disassociation of Acids vs Their Conjugate Bases

Postby Jake Ney lecture 1 discussion 1F » Sun Nov 29, 2015 11:49 pm

For problem 12.107 does a strong acid or its conjugate base disassociate more hydronium/hydroxide ions? Furthermore how does the PKa or PKb of a solution correlate with the strength of the acid or its conjugate base?

Angela Chen 2K
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Joined: Fri Sep 25, 2015 3:00 am

Re: Disassociation of Acids vs Their Conjugate Bases

Postby Angela Chen 2K » Mon Nov 30, 2015 12:17 am

Given that the acid is characterized as "strong" in your question, its resultant conjugate base would be weaker, and so be less effective in dissociation. The smaller the pKa is, the stronger the acid. So in 12.107 pt c, when it asks for the solution with the highest pKa, what it's really asking for is the weakest, least dissociated acid. The same goes for part b, due to the inverse relationship with the size of pKa vs. pKb. Hope this helped.


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