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August 5, 2015

Homework Help: Chemistry Lab

Posted by Erin Lee on Tuesday, October 30, 2012 at 1:07pm.

A 15.00 mL sample of a weak acid with Ka = 3.52x10-4, was titrated with 0.475 M KOH. The equivalence point was reached after addition of 19.5 mL of KOH with the phenolphthalein indicator. Determine the molar concentration of the original acid solution, then find pH and a % ionization of the acid in the original solution.

How do I set up this problem? I don't know where to start.

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