4. Lactic acid C3H603 is found in sour milk where it is produced by the action of lactobacilli in lactose or the sugar in milk. The pH of a 0.049 M solution of lactic acid was determined using a pH probe and found to be 2.63. a. Calculate the equilibrium constant for this acid. Mr b. Had you not been given the pH of the acid and you had to measure it yourself, how would the method in part 2 be applied to the determination of Ka? Would you expect an improvement in the accuracy of your result with the application of the method of this experiment? Explain why or why not.

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.71PAE: Acrylic acid is used in the polymer industry in the production of acrylates. Its K, is 5.6 X 10“’....
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How can we answer questions 4 part a and b?
4.
Lactic acid C3H603 is found in sour milk where it is produced by the action
of lactobacilli in lactose or the sugar in milk. The pH of a 0.049 M solution of lactic
acid was determined using a pH probe and found to be 2.63.
a. Calculate the equilibrium constant for this acid.
bords
MAXE
b. Had you not been given the pH of the acid and you had to measure it yourself,
how would the method in part 2 be applied to the determination of Ka? Would
you expect an improvement in the accuracy of your result with the application of
the method of this experiment? Explain why or why not.
[A]
Transcribed Image Text:4. Lactic acid C3H603 is found in sour milk where it is produced by the action of lactobacilli in lactose or the sugar in milk. The pH of a 0.049 M solution of lactic acid was determined using a pH probe and found to be 2.63. a. Calculate the equilibrium constant for this acid. bords MAXE b. Had you not been given the pH of the acid and you had to measure it yourself, how would the method in part 2 be applied to the determination of Ka? Would you expect an improvement in the accuracy of your result with the application of the method of this experiment? Explain why or why not. [A]
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