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23.0 mL 4.80 57.0 mL 91.0 mL 24.0 mL 5.77 58.0 mL 92.0 mL 25.0 mL 6.16 59.0 mL 93.0 mL 26.0 mL 6.36 60.0 mL 94.0 mL 27.0 mL 6.54 61.0 mL 95.0 mL 28.0 mL 6.67 62.0 mL 96.0 mL 29.0 mL 6.81 63.0 mL 97.0 mL 30.0 mL 6.92 64.0 mL 98.0 mL 31.0 mL 7.02 65.0 mL 99.0 mL 32.0 mL 7.12 66.0 mL 100.0 mL 33.0 mL 7.22 67.0 mL 101.0 mL Standardization of the NaOH solution Trial 1 Trial 2 Trial 3 Volume of NaOH added 18.2 17.8 18.1 Molarity of the NaOH 6.37x10^-4 1.26x10^-3 1.95x10^-3 Average Molarity of NaOH 1.28x10^-3 Standard deviation Volume of weak acid titrated (mL): 25 (mL) Volume of NaOH added pH measured Volume of NaOH added pH measured Volume of pH measured NaOH added 0.0 mL 1.52 34.0 mL 7.31 68.0 mL 1.0 mL 1.48 35.0 mL 7.42 69.0 mL 2.0 mL 1.45 36.0 mL 7.51 70.0 mL 3.0 mL 1.51 37.0 mL 7.61 71.0 mL 4.0 mL 1.56 38.0 mL 7.72 72.0 mL 5.0 mL 1.61 39.0 mL 7.84 73.0 mL 6.0 mL 1.68 40.0 mL 7.99 74.0 mL 7.0 mL 1.73 41.0 mL 8.14 75.0 mL 8.0 mL 1.79 42.0 mL 8.38 76.0 mL 9.0 mL 1.83 43.0 mL 8.85 77.0 mL 10.0 mL 1.88 44.0 mL 10.14 78.0 mL 11.0 mL 1.94 45.0 mL 11.08 79.0 mL 12.0 mL 2.01 46.0 mL 11.59 80.0 mL 13.0 mL 2.07 47.0 mL 11.83 81.0 mL 14.0 mL 2.15 48.0 mL 12.02 82.0 mL 15.0 mL 2.25 49.0 mL 83.0 mL 16.0 mL 2.32 50.0 mL 84.0 mL 17.0 mL 2.42 51.0 mL 85.0 mL 18.0 mL 2.52 52.0 mL 86.0 mL 19.0 mL 2.66 53.0 mL 87.0 mL 20.0 mL 2.82 54.0 mL 88.0 mL 21.0 mL 3.05 55.0 mL 89.0 mL 22.0 mL 3.42 56.0 mL 90.0 mL

23.0 mL 4.80 57.0 mL 91.0 mL 24.0 mL 5.77 58.0 mL 92.0 mL 25.0 mL 6.16 59.0 mL 93.0 mL 26.0 mL 6.36 60.0 mL 94.0 mL 27.0 mL 6.54 61.0 mL 95.0 mL 28.0 mL 6.67 62.0 mL 96.0 mL 29.0 mL 6.81 63.0 mL 97.0 mL 30.0 mL 6.92 64.0 mL 98.0 mL 31.0 mL 7.02 65.0 mL 99.0 mL 32.0 mL 7.12 66.0 mL 100.0 mL 33.0 mL 7.22 67.0 mL 101.0 mL Standardization of the NaOH solution Trial 1 Trial 2 Trial 3 Volume of NaOH added 18.2 17.8 18.1 Molarity of the NaOH 6.37x10^-4 1.26x10^-3 1.95x10^-3 Average Molarity of NaOH 1.28x10^-3 Standard deviation Volume of weak acid titrated (mL): 25 (mL) Volume of NaOH added pH measured Volume of NaOH added pH measured Volume of pH measured NaOH added 0.0 mL 1.52 34.0 mL 7.31 68.0 mL 1.0 mL 1.48 35.0 mL 7.42 69.0 mL 2.0 mL 1.45 36.0 mL 7.51 70.0 mL 3.0 mL 1.51 37.0 mL 7.61 71.0 mL 4.0 mL 1.56 38.0 mL 7.72 72.0 mL 5.0 mL 1.61 39.0 mL 7.84 73.0 mL 6.0 mL 1.68 40.0 mL 7.99 74.0 mL 7.0 mL 1.73 41.0 mL 8.14 75.0 mL 8.0 mL 1.79 42.0 mL 8.38 76.0 mL 9.0 mL 1.83 43.0 mL 8.85 77.0 mL 10.0 mL 1.88 44.0 mL 10.14 78.0 mL 11.0 mL 1.94 45.0 mL 11.08 79.0 mL 12.0 mL 2.01 46.0 mL 11.59 80.0 mL 13.0 mL 2.07 47.0 mL 11.83 81.0 mL 14.0 mL 2.15 48.0 mL 12.02 82.0 mL 15.0 mL 2.25 49.0 mL 83.0 mL 16.0 mL 2.32 50.0 mL 84.0 mL 17.0 mL 2.42 51.0 mL 85.0 mL 18.0 mL 2.52 52.0 mL 86.0 mL 19.0 mL 2.66 53.0 mL 87.0 mL 20.0 mL 2.82 54.0 mL 88.0 mL 21.0 mL 3.05 55.0 mL 89.0 mL 22.0 mL 3.42 56.0 mL 90.0 mL

Chemistry
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Weak Acid titration

1st Equivalence point volume of NaOH added:         _______________

1st Mid-point volume of NaOH added:                      _______________

2nd Equivalence point volume of NaOH added:        _______________

2nd Mid-point volume of NaOH added:                     _______________

pKa1 of the unknown weak acid:                                _______________

Ka1 of the unknown weak acid:                                  _______________

pKa2 of the unknown weak acid:                                _______________

Ka2 of the unknown weak acid:                                  _______________

Concentration of the unknown weak acid, [H2A]:     _______________

(show your work)

23.0 mL 4.80 57.0 mL 91.0 mL 24.0 mL 5.77 58.0 mL 92.0 mL 25.0 mL 6.16 59.0 mL 93.0 mL 26.0 mL 6.36 60.0 mL 94.0 mL 27.0 mL 6.54 61.0 mL 95.0 mL 28.0 mL 6.67 62.0 mL 96.0 mL 29.0 mL 6.81 63.0 mL 97.0 mL 30.0 mL 6.92 64.0 mL 98.0 mL 31.0 mL 7.02 65.0 mL 99.0 mL 32.0 mL 7.12 66.0 mL 100.0 mL 33.0 mL 7.22 67.0 mL 101.0 mL Standardization of the NaOH solution Trial 1 Trial 2 Trial 3 Volume of NaOH added 18.2 17.8 18.1 Molarity of the NaOH 6.37x10^-4 1.26x10^-3 1.95x10^-3 Average Molarity of NaOH 1.28x10^-3 Standard deviation
Transcribed Image Text:23.0 mL 4.80 57.0 mL 91.0 mL 24.0 mL 5.77 58.0 mL 92.0 mL 25.0 mL 6.16 59.0 mL 93.0 mL 26.0 mL 6.36 60.0 mL 94.0 mL 27.0 mL 6.54 61.0 mL 95.0 mL 28.0 mL 6.67 62.0 mL 96.0 mL 29.0 mL 6.81 63.0 mL 97.0 mL 30.0 mL 6.92 64.0 mL 98.0 mL 31.0 mL 7.02 65.0 mL 99.0 mL 32.0 mL 7.12 66.0 mL 100.0 mL 33.0 mL 7.22 67.0 mL 101.0 mL Standardization of the NaOH solution Trial 1 Trial 2 Trial 3 Volume of NaOH added 18.2 17.8 18.1 Molarity of the NaOH 6.37x10^-4 1.26x10^-3 1.95x10^-3 Average Molarity of NaOH 1.28x10^-3 Standard deviation
Volume of weak acid titrated (mL): 25 (mL) Volume of NaOH added pH measured Volume of NaOH added pH measured Volume of pH measured NaOH added 0.0 mL 1.52 34.0 mL 7.31 68.0 mL 1.0 mL 1.48 35.0 mL 7.42 69.0 mL 2.0 mL 1.45 36.0 mL 7.51 70.0 mL 3.0 mL 1.51 37.0 mL 7.61 71.0 mL 4.0 mL 1.56 38.0 mL 7.72 72.0 mL 5.0 mL 1.61 39.0 mL 7.84 73.0 mL 6.0 mL 1.68 40.0 mL 7.99 74.0 mL 7.0 mL 1.73 41.0 mL 8.14 75.0 mL 8.0 mL 1.79 42.0 mL 8.38 76.0 mL 9.0 mL 1.83 43.0 mL 8.85 77.0 mL 10.0 mL 1.88 44.0 mL 10.14 78.0 mL 11.0 mL 1.94 45.0 mL 11.08 79.0 mL 12.0 mL 2.01 46.0 mL 11.59 80.0 mL 13.0 mL 2.07 47.0 mL 11.83 81.0 mL 14.0 mL 2.15 48.0 mL 12.02 82.0 mL 15.0 mL 2.25 49.0 mL 83.0 mL 16.0 mL 2.32 50.0 mL 84.0 mL 17.0 mL 2.42 51.0 mL 85.0 mL 18.0 mL 2.52 52.0 mL 86.0 mL 19.0 mL 2.66 53.0 mL 87.0 mL 20.0 mL 2.82 54.0 mL 88.0 mL 21.0 mL 3.05 55.0 mL 89.0 mL 22.0 mL 3.42 56.0 mL 90.0 mL
Transcribed Image Text:Volume of weak acid titrated (mL): 25 (mL) Volume of NaOH added pH measured Volume of NaOH added pH measured Volume of pH measured NaOH added 0.0 mL 1.52 34.0 mL 7.31 68.0 mL 1.0 mL 1.48 35.0 mL 7.42 69.0 mL 2.0 mL 1.45 36.0 mL 7.51 70.0 mL 3.0 mL 1.51 37.0 mL 7.61 71.0 mL 4.0 mL 1.56 38.0 mL 7.72 72.0 mL 5.0 mL 1.61 39.0 mL 7.84 73.0 mL 6.0 mL 1.68 40.0 mL 7.99 74.0 mL 7.0 mL 1.73 41.0 mL 8.14 75.0 mL 8.0 mL 1.79 42.0 mL 8.38 76.0 mL 9.0 mL 1.83 43.0 mL 8.85 77.0 mL 10.0 mL 1.88 44.0 mL 10.14 78.0 mL 11.0 mL 1.94 45.0 mL 11.08 79.0 mL 12.0 mL 2.01 46.0 mL 11.59 80.0 mL 13.0 mL 2.07 47.0 mL 11.83 81.0 mL 14.0 mL 2.15 48.0 mL 12.02 82.0 mL 15.0 mL 2.25 49.0 mL 83.0 mL 16.0 mL 2.32 50.0 mL 84.0 mL 17.0 mL 2.42 51.0 mL 85.0 mL 18.0 mL 2.52 52.0 mL 86.0 mL 19.0 mL 2.66 53.0 mL 87.0 mL 20.0 mL 2.82 54.0 mL 88.0 mL 21.0 mL 3.05 55.0 mL 89.0 mL 22.0 mL 3.42 56.0 mL 90.0 mL
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