Phosphoric acid is a triprotic acid with the pK, values pK,l = 2.148, pK2 = 7.198, and pKy = 12.375. You wish to prepare 1.000 L of a 0.0500 M phosphate buffer at pH 7.780. To do this, you choose to mix the two salt forms involved in the second ionization, NaH, PO, and Na, HPO,, in a 1.000L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? 2.11 mass NaH, PO, = Incorrect 6.02 mass Na, HPO, Incorrect What other combination of phosphoric acid and its salts could be mixed to prepare this buffer? O H, PO, and Na, PO, NaH, PO, and Na, PO, O H, PO, and Na, HPO, H, PO, and NaH, PO, Na, HPO, and Na, PO,

Phosphoric acid is a triprotic acid with the pK, values pK,l = 2.148, pK2 = 7.198, and pKy = 12.375. You wish to prepare 1.000 L of a 0.0500 M phosphate buffer at pH 7.780. To do this, you choose to mix the two salt forms involved in the second ionization, NaH, PO, and Na, HPO,, in a 1.000L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? 2.11 mass NaH, PO, = Incorrect 6.02 mass Na, HPO, Incorrect What other combination of phosphoric acid and its salts could be mixed to prepare this buffer? O H, PO, and Na, PO, NaH, PO, and Na, PO, O H, PO, and Na, HPO, H, PO, and NaH, PO, Na, HPO, and Na, PO,

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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