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Which acid(s) could you use to make a buffer with a pH = 3.50 (choose all that would work)? a. H3PO4 b. HF c. CH3CH(OH)CO2H d. CH3CO2H

Which acid(s) could you use to make a buffer with a pH = 3.50 (choose all that would work)? a. H3PO4 b. HF c. CH3CH(OH)CO2H d. CH3CO2H

Chemistry
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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Which acid(s) could you use to make a buffer with a pH = 3.50 (choose all that would work)?

a. H3PO4
b. HF
c. CH3CH(OH)CO2H
d. CH3CO2H
TABLE 7.4 KA AND PKA VALUES FOR SELECTED ACIDS Formula pKa Name K, Hydrochloric acid HCI 1.0× 107 -7.00 Phosphoric acid H;PO4 7.5 × 10-3 2.12 Hydrofluoric acid HF 6.6× 10 4 3.18 Lactic acid CH;CH(OH)CO,H 1.4 X 104 3.85 Acetic acid CH;CO,H 1.8 X 105 4.74 Carbonic acid H2CO3 4.4× 10-7 6.36 Dihydrogen phosphate ion H,PO4 6.2 × 10¯ 7.21 -10 Ammonium ion NH,+ 5.6X 10 9.25 -10 Hydrocyanic acid HCN 4.9 × 10 9.31 -11 Hydrogen carbonate ion HCO3 5.6X 10 10.25 CH3NH3 + -11 Methylammonium ion 2.4 × 10 10.62 Hydrogen phosphate ion HPO,²- 4.2 × 10-13 12.38 © 2014 John Wiley & Sons, Inc. All rights reserved.
Transcribed Image Text:TABLE 7.4 KA AND PKA VALUES FOR SELECTED ACIDS Formula pKa Name K, Hydrochloric acid HCI 1.0× 107 -7.00 Phosphoric acid H;PO4 7.5 × 10-3 2.12 Hydrofluoric acid HF 6.6× 10 4 3.18 Lactic acid CH;CH(OH)CO,H 1.4 X 104 3.85 Acetic acid CH;CO,H 1.8 X 105 4.74 Carbonic acid H2CO3 4.4× 10-7 6.36 Dihydrogen phosphate ion H,PO4 6.2 × 10¯ 7.21 -10 Ammonium ion NH,+ 5.6X 10 9.25 -10 Hydrocyanic acid HCN 4.9 × 10 9.31 -11 Hydrogen carbonate ion HCO3 5.6X 10 10.25 CH3NH3 + -11 Methylammonium ion 2.4 × 10 10.62 Hydrogen phosphate ion HPO,²- 4.2 × 10-13 12.38 © 2014 John Wiley & Sons, Inc. All rights reserved.
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