10. Citric acid, C,H3O7, is a triacid written H3A. The diagram below shows the predominance domains of the acid-base conjugates of all 3 of its acidities, The curves represent the concentrations of each conjugate depending on the pH of the solution. 1.5 -. 45 1 3 4 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 1 2 3 4 5 6 7 8 10 pH a. Write the dissociation reactions associated with each acidity of H3A. ( b. Identify each of the species 1 through 4. c. Using the diagram, find the values of pKal, paa2, pKa3 associated with each acidity. ( Concentration (M)

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Chapter15: Acids And Bases
Section: Chapter Questions
Problem 15.101QP
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10. Citric acid, C¢H§O7, is a triacid written H3A. The diagram below
shows the predominance domains of the acid-base conjugates of
all 3 of its acidities, The curves represent the concentrations of
each conjugate depending on the pH of the solution.
1.5
2
4
-. 45
1
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
1 2 3
4
7
8
9.
10
pH
a. Write the dissociation reactions associated with each acidity
of H3A. (
b. Identify each of the species 1 through 4.
c. Using the diagram, find the values of pKa1, paraz, pKa3
associated with each acidity. (
Concentration (M)
Transcribed Image Text:10. Citric acid, C¢H§O7, is a triacid written H3A. The diagram below shows the predominance domains of the acid-base conjugates of all 3 of its acidities, The curves represent the concentrations of each conjugate depending on the pH of the solution. 1.5 2 4 -. 45 1 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 1 2 3 4 7 8 9. 10 pH a. Write the dissociation reactions associated with each acidity of H3A. ( b. Identify each of the species 1 through 4. c. Using the diagram, find the values of pKa1, paraz, pKa3 associated with each acidity. ( Concentration (M)
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