4. From the following list, choose the correct reagents and calculate the volumes needed to make 500.0 mL of a 0.20 M buffer with a pH of 5.85. H3A has a pKa1 of 3.55, pKa2 of 5.33, and pKa3 of 7.88. 2.0 M Na3A 1.5 M Na2HA 1.0 M NaH2A 2.5 M H3A

4. From the following list, choose the correct reagents and calculate the volumes needed to make 500.0 mL of a 0.20 M buffer with a pH of 5.85. H3A has a pKa1 of 3.55, pKa2 of 5.33, and pKa3 of 7.88. 2.0 M Na3A 1.5 M Na2HA 1.0 M NaH2A 2.5 M H3A

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 53QAP

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Question 4

4. From the following list, choose the correct reagents and calculate the volumes needed to make 500.0
mL of a 0.20 M buffer with a pH of 5.85. H3A has a pKa1 of 3.55, pKa2 of 5.33, and pK₂3 of 7.88.
2.0 M Na3A
1.5 M Na2HA
1.0 M NaH2A
2.5 M H3A
Reagent 1:
Reagent 2:

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