Match each circumstance to an outcome. (Two circumstances may have the same outcome.) You refilled your buret between titrations of your unknown 3 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 1 NaOH rather than after every 0.5 mL during the 1. pKa would be unchanged 1. neutralization of your acid sample. 2. pKa would be too high. The pH buffers used to calibrate the pH meter were each 2 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 7.0 respectively). 3. pKa would be too low.
Match each circumstance to an outcome. (Two circumstances may have the same outcome.) You refilled your buret between titrations of your unknown 3 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 1 NaOH rather than after every 0.5 mL during the 1. pKa would be unchanged 1. neutralization of your acid sample. 2. pKa would be too high. The pH buffers used to calibrate the pH meter were each 2 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 7.0 respectively). 3. pKa would be too low.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 95AP
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Transcribed Image Text:Question 1
Match each circumstance to an outcome. (Two circumstances may have the same outcome.)
You refilled your buret between titrations of your unknown
3 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
1 NaOH rather than after every 0.5 mL during the
neutralization of your acid sample.
1. pKa would be unchanged.
2. pKa would be too high.
The pH buffers used to calibrate the pH meter were each
2 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 7.0
respectively).
3. pKa would be too low.
While using the Half Volume method, your solution was
2 dark pink (you overshot the endpoint) and you added the
unreacted acid to this solution.
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