Benzoic acid has a pKa = 4.20 at a pH of 6.20 the ratio [A-]/[HA] is what?O 1:1001:501:101:1 Oxalic acid is a diprotic acid with the following pK's (pK1 = 1.250 and pK2 = 4.266). Oxalic acid cantake the forms, H₂A, HA, and A2-. What is the predominate species at pH = 5?42-0 H2AO HA43.

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Benzoic acid has a pKa = 4.20 at a pH of 6.20 the ratio [A-]/[HA] is what? O 1:100 1:50 1:10 1:1

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter23: Organic Polymers, Natural And Synthetic

Section: Chapter Questions

Problem 29QAP: For alanine, Ka1=5.1105,Ka2=1.81010 . Calculate the ratios [Z]/[C+] and [Z]/[A+] at pH (a) 2.00. (b)...

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Question

Benzoic acid has a pKa = 4.20 at a pH of 6.20 the ratio [A-]/[HA] is what?
O 1:100
1:50
1:10
1:1

Oxalic acid is a diprotic acid with the following pK's (pK1 = 1.250 and pK2 = 4.266). Oxalic acid can
take the forms, H₂A, HA, and A2-. What is the predominate species at pH = 5?
42-
0 H2A
O HA
43.

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