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August 2, 2015

Homework Help: Chemistry

Posted by Anonymous on Thursday, October 28, 2010 at 4:20pm.

A 35.0 mL sample of 0.150 M acetic acid is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added:
a) 0mL, b) 17.5 mL, c) 34.5 mL, d) 35 mL

I've figured out a,b, and c. But at 35 mL the moles become equal so when I plug the numbers into Henderson Hasselbach equation I get log to be 1 which makes the pH be 4.74 which is obviously not right. What am I doing wrong?

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