CH3COOH+ NaOH The first titration used phenolphthalein, the endpoint was 43.5ml The second titration use PH sensor, Average Ka = 7.56x10^-6, SD ka= 4.9x10^-7 Comment on the accuracy and precision of your K, value.

Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN:9781285686691
Author:Crouch
Publisher:Crouch
Chapter8: Polyfunctional Acids And Bases
Section: Chapter Questions
Problem 11P
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Titration of vinegar

 

CH3COOH+ NaOH
The first titration used phenolphthalein, the
endpoint was 43.5ml
The second titration use PH sensor,
Average Ka = 7.56x10^-6, SD ka= 4.9x10^-7
Comment on the accuracy and precision of your K, value.
Was the endpoint equal to the equivalence point? Look up the pK, of phenolphthalein
and use that value to explain any deviation or similarity.
Transcribed Image Text:CH3COOH+ NaOH The first titration used phenolphthalein, the endpoint was 43.5ml The second titration use PH sensor, Average Ka = 7.56x10^-6, SD ka= 4.9x10^-7 Comment on the accuracy and precision of your K, value. Was the endpoint equal to the equivalence point? Look up the pK, of phenolphthalein and use that value to explain any deviation or similarity.
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