From lab manual: the pKa of acetic acid is 4.75 and the volume of the vinegar is 21.05. This is a titration of a vinegar samples using a pH meter. Determine the volume of 0.1 M NaOH dispensed furing the tiration. Caclualate the molarity of the aceic acid vinegar. Calulate the pKa of acetic from the midpoint data unsing the Henderson-Hasselbach equations.Please help me understand how to do these calculations, not just the answers, I am so lost. I don't need answers for every sample just for sample one and the calculations so I know how to calculate the other two. Thank you! VinegarVinegarSample 2VinegarCalculations forVinegarSample 1VinegarSample 2VinegarSample 3Calculations forSample 1Sample 3Sample 1Sample 1Moles of NaOHInitial Buret Reading(mL)2.893.001.61Consumed atMidpoint Reading[A-] (moles)Midpoint pH4.8024.8954.687ReadingMoles of AceticAcid Remaining atMidpoint [HA](moles)Midpoint Buret11.7412.929.50Reading (ml)Final pH Reading8.2388.5318.934Calculated pkaFinal Buret Reading20.1220.3119.00(mL)Average pkaVolume of NaOH20.12 ml - 2.89 mL= 17.23 ml17.23 mL17.31 mL17.39 mlPercent error onpkaDispensed (mL)Calculated Molarityof Acetic Acid inthe Vinegar Sample(M = moles/L)Average MolarityAcetic Acid (M =moles/L)Average MassPercent of AceticAcid Concentration(g)Volume NaOHDispensed atMidpoint Reading(mL)

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Answered: From lab manual: the pKa of acetic acid…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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From lab manual: the pKa of acetic acid is 4.75 and the volume of the vinegar is 21.05. This is a titration of a vinegar samples using a pH meter. Determine the volume of 0.1 M NaOH dispensed furing the tiration. Caclualate the molarity of the aceic acid vinegar. Calulate the pKa of acetic from the midpoint data unsing the Henderson-Hasselbach equations.

Please help me understand how to do these calculations, not just the answers, I am so lost. I don't need answers for every sample just for sample one and the calculations so I know how to calculate the other two. Thank you!

Vinegar
Vinegar
Sample 2
Vinegar
Calculations for
Vinegar
Sample 1
Vinegar
Sample 2
Vinegar
Sample 3
Calculations for
Sample 1
Sample 3
Sample 1
Sample 1
Moles of NaOH
Initial Buret Reading
(mL)
2.89
3.00
1.61
Consumed at
Midpoint Reading
[A-] (moles)
Midpoint pH
4.802
4.895
4.687
Reading
Moles of Acetic
Acid Remaining at
Midpoint [HA]
(moles)
Midpoint Buret
11.74
12.92
9.50
Reading (ml)
Final pH Reading
8.238
8.531
8.934
Calculated pka
Final Buret Reading
20.12
20.31
19.00
(mL)
Average pka
Volume of NaOH
20.12 ml - 2.89 mL
= 17.23 ml
17.23 mL
17.31 mL
17.39 ml
Percent error on
pka
Dispensed (mL)
Calculated Molarity
of Acetic Acid in
the Vinegar Sample
(M = moles/L)
Average Molarity
Acetic Acid (M =
moles/L)
Average Mass
Percent of Acetic
Acid Concentration
(g)
Volume NaOH
Dispensed at
Midpoint Reading
(mL)

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