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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

Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter8: Acids And Bases
Section: Chapter Questions
Problem 8.113P
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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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