A 0.544 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 28.0 mL . The solution is then titrated with a saturated calcium hydroxide solution. A. Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points. B. The pH after adding 28.0 mL of the base was 3.82. Find the value of pKa1 . C. The pH after adding 21.0 mL past the first equivalence point was 8.32. Find the value of pKa2 .
A 0.544 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 28.0 mL . The solution is then titrated with a saturated calcium hydroxide solution. A. Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points. B. The pH after adding 28.0 mL of the base was 3.82. Find the value of pKa1 . C. The pH after adding 21.0 mL past the first equivalence point was 8.32. Find the value of pKa2 .
Chemistry
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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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A 0.544 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 28.0 mL . The solution is then titrated with a saturated calcium hydroxide solution. A. Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points. B. The pH after adding 28.0 mL of the base was 3.82. Find the value of pKa1 . C. The pH after adding 21.0 mL past the first equivalence point was 8.32. Find the value of pKa2 .
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