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A diprotic acid, H2A, has the following acid dissociation constants: Ka1 = 1.1 x 10-3 and Ka2 = 2.5 x 10-6. Which combination of species would you use to make a buffer solution whose pH is 5.80? A)  NaHA/H2A B)  Na2A/NaHA C)  H2A/NaHA/Na2A D)  H2A/Na2A E)  H2A and its conjugates cannot be used to form a buffer of pH = 5.80

A diprotic acid, H2A, has the following acid dissociation constants: Ka1 = 1.1 x 10-3 and Ka2 = 2.5 x 10-6. Which combination of species would you use to make a buffer solution whose pH is 5.80? A)  NaHA/H2A B)  Na2A/NaHA C)  H2A/NaHA/Na2A D)  H2A/Na2A E)  H2A and its conjugates cannot be used to form a buffer of pH = 5.80

General, Organic, and Biological Chemistry
General, Organic, and Biological Chemistry
7th Edition
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:H. Stephen Stoker
Chapter10: Acids, Bases, And Salts
Section: Chapter Questions
Problem 10.112EP: Write an equation for each of the following buffering actions. a. the response of a HPO42/PO43...
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  1. A diprotic acid, H2A, has the following acid dissociation constants: Ka1 = 1.1 x 10-3 and Ka2 = 2.5 x 10-6. Which combination of species would you use to make a buffer solution whose pH is 5.80?

    1. A)  NaHA/H2A

    2. B)  Na2A/NaHA

    3. C)  H2A/NaHA/Na2A

    4. D)  H2A/Na2A

    5. E)  H2A and its conjugates cannot be used to form a buffer of pH = 5.80

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