You decided to take the pH after each addition of 5.0 mL of NaOH rather than after every 0.5 mL during the neutralization of your acid sample. The pH buffers used to calibrate the pH meter were each 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 1. pKa would be unchanged. 7.0 respectively). 2. pKa would be too high. While using the Half Volume method, your solution was dark pink (you overshot the endpoint) and added the unreacted 3. pka would be too low. you acid to this solution. You refilled your buret between titrations of your unknown acid. Instead of using 0.1 M NAOH as you did for the first titration, you used 0.2 M NaOH.

You decided to take the pH after each addition of 5.0 mL of NaOH rather than after every 0.5 mL during the neutralization of your acid sample. The pH buffers used to calibrate the pH meter were each 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 1. pKa would be unchanged. 7.0 respectively). 2. pKa would be too high. While using the Half Volume method, your solution was dark pink (you overshot the endpoint) and added the unreacted 3. pka would be too low. you acid to this solution. You refilled your buret between titrations of your unknown acid. Instead of using 0.1 M NAOH as you did for the first titration, you used 0.2 M NaOH.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.22QAP

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