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1.96 Initial pH From your analysis of the titration curve: 23.203 mL of NaOH used to reach the equivalence point. Calculated Molarity of the unknown acid 0.09696 2.92 pH at the half-way to the equivalence point pKa the unknown acid Ka of the unknown acid Identity of unknown acid

1.96 Initial pH From your analysis of the titration curve: 23.203 mL of NaOH used to reach the equivalence point. Calculated Molarity of the unknown acid 0.09696 2.92 pH at the half-way to the equivalence point pKa the unknown acid Ka of the unknown acid Identity of unknown acid

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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unbe 10. Use the volume of NaOH used to reach the equivalence point, the given molarity of the NaOH used, and the volume of acid used to calculate the molarity of the acid. 11. Find the pH at the point when 2 of the NaOH needed to reach the equivalence was added. Use this to find the pka of the acid, and the Ka of the acid. 12. Using your value of Ka, identify your unknown acid. Possible unknowns are listed in table below. Name Formula Ка pKa Аcetic acid HC2H3O2 1.76 x 10-5 4.75 Sodium bisulfite NaHSO4 1.02 x 10-2 1.99 Formic acid HCHO2 1.77 x 10-4 3.75 Propionic Acid C3H6O2 1.34 x 10-5 4.87 Chloroacetic Acid HCICH2O2 1.40 x 10-3 2.85 13. Print a copy of the graph of the titration. You can print the graph directly from LabQuest. Part D: Addition of an acid and base to a buffer solution 1. In order to create a buffer, add 20.00mL of your weak acid into a clean 125 mL flask using a pipette.
Transcribed Image Text:unbe 10. Use the volume of NaOH used to reach the equivalence point, the given molarity of the NaOH used, and the volume of acid used to calculate the molarity of the acid. 11. Find the pH at the point when 2 of the NaOH needed to reach the equivalence was added. Use this to find the pka of the acid, and the Ka of the acid. 12. Using your value of Ka, identify your unknown acid. Possible unknowns are listed in table below. Name Formula Ка pKa Аcetic acid HC2H3O2 1.76 x 10-5 4.75 Sodium bisulfite NaHSO4 1.02 x 10-2 1.99 Formic acid HCHO2 1.77 x 10-4 3.75 Propionic Acid C3H6O2 1.34 x 10-5 4.87 Chloroacetic Acid HCICH2O2 1.40 x 10-3 2.85 13. Print a copy of the graph of the titration. You can print the graph directly from LabQuest. Part D: Addition of an acid and base to a buffer solution 1. In order to create a buffer, add 20.00mL of your weak acid into a clean 125 mL flask using a pipette.
Volume delivered Molarity of unknown acid Part C: Titration of unknown monoprotic acid using NaOH and a pH sensor 1.96 Initial pH From your analysis of the titration curve: 23.203 mL of NaOH used to reach the equivalence point 0.09696 Calculated Molarity of the unknown acid 2.92 pH at the half-way to the equivalence point pKa the unknown acid Ka of the unknown acid Identity of unknown acid Part D: Addition of an acid and base to a buffer solution
Transcribed Image Text:Volume delivered Molarity of unknown acid Part C: Titration of unknown monoprotic acid using NaOH and a pH sensor 1.96 Initial pH From your analysis of the titration curve: 23.203 mL of NaOH used to reach the equivalence point 0.09696 Calculated Molarity of the unknown acid 2.92 pH at the half-way to the equivalence point pKa the unknown acid Ka of the unknown acid Identity of unknown acid Part D: Addition of an acid and base to a buffer solution
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