You are given a solution that contains a mixture of two weak acids. You take a 50.00 mL sample of the mixture and titrate it with 0.1000M NaOH using a pH meter. You obtain the data shown in the plot below. 12 10 8 6 4 2 0 0 5 Titration of a mixture 10 15 vol (mL) NaOH added 20 25 30 Determine the first and second equivalence volumes. Use the equivalence volumes to determine how many moles of NaOH was used to titrate each acid. Use those values to determine the concentration of each acid in the original mixture. Finally, estimate the pKa values for each acid from the plot. Show your calculations and explain any choices you have made.
You are given a solution that contains a mixture of two weak acids. You take a 50.00 mL sample of the mixture and titrate it with 0.1000M NaOH using a pH meter. You obtain the data shown in the plot below. 12 10 8 6 4 2 0 0 5 Titration of a mixture 10 15 vol (mL) NaOH added 20 25 30 Determine the first and second equivalence volumes. Use the equivalence volumes to determine how many moles of NaOH was used to titrate each acid. Use those values to determine the concentration of each acid in the original mixture. Finally, estimate the pKa values for each acid from the plot. Show your calculations and explain any choices you have made.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 96AP
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