As a technician in a large pharmaceutical research firm, you need to produce 450. mL of a potassium dihydrogen phosphate buffer solution of pH = 6.80. The pKa of H₂PO4 is 7.21. You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K₂HPO4 stock solution, and a carboy of pure distilled H₂O. How much 1.00 M KH₂PO4 will you need to make this solution? (Assume additive volumes.) Express your answer to three significant digits with the appropriate units. ► View Available Hint(s) Volume of KH₂PO4 needed = μÅ Value Units ?
As a technician in a large pharmaceutical research firm, you need to produce 450. mL of a potassium dihydrogen phosphate buffer solution of pH = 6.80. The pKa of H₂PO4 is 7.21. You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K₂HPO4 stock solution, and a carboy of pure distilled H₂O. How much 1.00 M KH₂PO4 will you need to make this solution? (Assume additive volumes.) Express your answer to three significant digits with the appropriate units. ► View Available Hint(s) Volume of KH₂PO4 needed = μÅ Value Units ?
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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Transcribed Image Text:As a technician in a large pharmaceutical research firm, you need to produce 450. mL of a potassium
dihydrogen phosphate buffer solution of pH = 6.80. The pKa of H₂PO4 is 7.21. You have the following
supplies: 2.00 L of 1.00 M KH₂PO4 stock solution, 1.50 L of 1.00 M K₂HPO4 stock solution, and a carboy
of pure distilled H₂O.
How much 1.00 M KH₂PO4 will you need to make this solution? (Assume additive volumes.)
Express your answer to three significant digits with the appropriate units.
► View Available Hint(s)
Volume of KH₂PO4 needed =
0
µÃ
Value
Units
?
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