Homework 6C.5

The Conjugate Seesaw

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Riya Sood 4G
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Joined: Sat Aug 24, 2019 12:18 am

Homework 6C.5

Postby Riya Sood 4G » Tue Jan 21, 2020 9:29 pm

6C.5 Write the chemical formula for the conjugate base of formic
acid, HCOOH and calculate its pKb from the pKa of formic acid
(see Table 6C.1).

what is the answer to this problem? Cannot find it in the solutions manual

Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: Homework 6C.5

Postby JChen_2I » Wed Jan 22, 2020 12:08 am

The answer is 10.25

Hope Hyland 2D
Posts: 50
Joined: Wed Feb 20, 2019 12:16 am

Re: Homework 6C.5

Postby Hope Hyland 2D » Wed Jan 22, 2020 1:51 am

The conjugate base for HCOOH would be HCOO-, and since the pKa is 3.75, you can subtract that from 14 (pKa+pKb=pKw=14), and get 10.25 for the pKb.

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