A biochemist working with bacteria requires a culture buffered at a pH of 3.6. Which of the following acid/conjugate base pairs is best for preparing this solution? O HCO2H/KCO2H; Ka = 1.8x10-4 HC2H3O2/NAC2H3O2; Ką = 1.8x1o-5 KH2PO4/K2HPO4; Ka2 = 6.2x10-8 %3D O H2CO3/NaHCO3; Ka1 = 4.5x10-7 %3D

A biochemist working with bacteria requires a culture buffered at a pH of 3.6. Which of the following acid/conjugate base pairs is best for preparing this solution? O HCO2H/KCO2H; Ka = 1.8x10-4 HC2H3O2/NAC2H3O2; Ką = 1.8x1o-5 KH2PO4/K2HPO4; Ka2 = 6.2x10-8 %3D O H2CO3/NaHCO3; Ka1 = 4.5x10-7 %3D

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter14: Acids And Bases

Section14.8: Acid-base Reactions Of Salts

Problem 14.21CE

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Question

A biochemist working with bacteria requires a culture buffered at a pH of 3.6. Which
of the following acid/conjugate base pairs is best for preparing this solution?
НCО2Н/КСO2Н; Ка - 1.8х10-4
HC2H3O2/NAC2H3O2; Ka = 1.8x10-5
KH2PO4/K2HP04; Ka2 = 6.2x108
O H2CO3/NAHCO3; Ka1 = 4.5x10-7

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