Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148, p?a2=7.198, and p?a3=12.375. You wish to prepare 1.000 L of a 0.0200 M phosphate buffer at pH 7.680. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?
Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148, p?a2=7.198, and p?a3=12.375. You wish to prepare 1.000 L of a 0.0200 M phosphate buffer at pH 7.680. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?
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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Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148, p?a2=7.198, and p?a3=12.375.
You wish to prepare 1.000 L of a 0.0200 M phosphate buffer at pH 7.680. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?
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