a Accessibility Mode a. In a hospital laboratory, a 10.0 mL sample of gastricjuice obtained several hours after a meal was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient's stomach contained no indigested food or drinks, thus assume no buffers were present. What is the pH of the gastricjuice?
a Accessibility Mode a. In a hospital laboratory, a 10.0 mL sample of gastricjuice obtained several hours after a meal was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient's stomach contained no indigested food or drinks, thus assume no buffers were present. What is the pH of the gastricjuice?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![Accessibility Mode
v Don
1. a. In a hospital laboratory, a 10.0 mL sample of gastricjuice obtained several hours
after a meal was titrated with 0.1 M NAOH to neutrality; 7.2 mL of NaOH was
required. The patient's stomach contained no indigested food or drinks, thus
assume no buffers were present. What is the pH of the gastricjuice?
b. Lactic acid is produced and builds up in muscles during intense exercise and
causes painful, sore muscles. What is the pH of 0.6 mM lactic acid, pKa=3.86?
1
c. What is the pH of a mixture of equal volumes of 0.6 mM HCI and 0.4 mM
NaOH?
d. What is the pH of a mixture of equal volumes of 0.6 mM Lactic acid and 0.4
mM NAOH?
e. If the concentrations of HCl and NaOH are tripled in part c, by what factoF will
the pH be changed?
f. If the concentrations of lactic acid and NaOH are tripled in part d, by what factor
the pH be changed?
g. What is tihe rationale for the observed difference in pH as a function of
increasing HCl and lactic acid concentrations?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1f2bfcd0-d6bd-4f63-9474-b581928beee0%2F9c3c59f2-a7e3-469b-bf8e-de0a1879498c%2Ff8bw9l9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Accessibility Mode
v Don
1. a. In a hospital laboratory, a 10.0 mL sample of gastricjuice obtained several hours
after a meal was titrated with 0.1 M NAOH to neutrality; 7.2 mL of NaOH was
required. The patient's stomach contained no indigested food or drinks, thus
assume no buffers were present. What is the pH of the gastricjuice?
b. Lactic acid is produced and builds up in muscles during intense exercise and
causes painful, sore muscles. What is the pH of 0.6 mM lactic acid, pKa=3.86?
1
c. What is the pH of a mixture of equal volumes of 0.6 mM HCI and 0.4 mM
NaOH?
d. What is the pH of a mixture of equal volumes of 0.6 mM Lactic acid and 0.4
mM NAOH?
e. If the concentrations of HCl and NaOH are tripled in part c, by what factoF will
the pH be changed?
f. If the concentrations of lactic acid and NaOH are tripled in part d, by what factor
the pH be changed?
g. What is tihe rationale for the observed difference in pH as a function of
increasing HCl and lactic acid concentrations?
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