14. Oral solutions of Lipitor are often prepared in a buffer solution with a pH = 7.4. Which of the following buffer pairs would be the best choice for preparing this buffer solution? ☐ a. H3PO4 / H2PO4¯ ☐ b. H2PO4- /HPO4²- c. HPO42/PO4³- d. H3PO3 / H2PO3¯ e. H₂PO3/HPO3²- Ka = 7.5×10-3 Ka = 6.2×10-8 Ka = 3.6×10-13 Ka = 1.6×10-2 Ka = 7.0×10-7

Chemistry by OpenStax (2015-05-04)
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Chapter14: Acid-base Equilibria
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14. Oral solutions of Lipitor are often prepared in a buffer solution with a pH = 7.4. Which of the
following buffer pairs would be the best choice for preparing this buffer solution?
☐ a. H3PO4 / H2PO4¯
☐ b. H2PO4- /HPO4²-
c. HPO42/PO4³-
d. H3PO3 / H2PO3¯
e. H₂PO3/HPO3²-
Ka = 7.5×10-3
Ka = 6.2×10-8
Ka = 3.6×10-13
Ka = 1.6×10-2
Ka = 7.0×10-7
Transcribed Image Text:14. Oral solutions of Lipitor are often prepared in a buffer solution with a pH = 7.4. Which of the following buffer pairs would be the best choice for preparing this buffer solution? ☐ a. H3PO4 / H2PO4¯ ☐ b. H2PO4- /HPO4²- c. HPO42/PO4³- d. H3PO3 / H2PO3¯ e. H₂PO3/HPO3²- Ka = 7.5×10-3 Ka = 6.2×10-8 Ka = 3.6×10-13 Ka = 1.6×10-2 Ka = 7.0×10-7
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