1. Does your molarity of acetic acid agree with the percent of acetic acid present in the sample? Use a calculation to determine this 2. At what pH does phenolphthalein turn pink? Do you think this causes an error in the measurement of the equivalence point?

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 100AP
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Acid Data table
Initial volume of Vinegar Percent acetic acid in
vinegar sample
HG mc
Base Data table
mol base = mol acid
I mol acid
I mol base
Concentration of NaOH
solution
Q.125M
Initial volume of NaOH.
in buret
2.50ml
0.98
15.30ml
Mol of acetic acid
0.016 mo
Final volume of NaOH
in buret
n mol and
0.016 L
54.00mL
50.ML
41.90mL
Molacid 16ml
yoland (2) ook
Molarity of Acetic acid
10.994 М
Mol NaOH added
51.5
49.12
Post-Activity questions
26.6
1. Does your molarity of acetic acid agree with the percent of acetic acid present in the sample?
Use a calculation to determine this
2. At what pH does phenolphthalein turn pink? Do you think this causes an error in the
measurement of the equivalence point?
Transcribed Image Text:Acid Data table Initial volume of Vinegar Percent acetic acid in vinegar sample HG mc Base Data table mol base = mol acid I mol acid I mol base Concentration of NaOH solution Q.125M Initial volume of NaOH. in buret 2.50ml 0.98 15.30ml Mol of acetic acid 0.016 mo Final volume of NaOH in buret n mol and 0.016 L 54.00mL 50.ML 41.90mL Molacid 16ml yoland (2) ook Molarity of Acetic acid 10.994 М Mol NaOH added 51.5 49.12 Post-Activity questions 26.6 1. Does your molarity of acetic acid agree with the percent of acetic acid present in the sample? Use a calculation to determine this 2. At what pH does phenolphthalein turn pink? Do you think this causes an error in the measurement of the equivalence point?
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