Pts based on the volume of naoh added in step 9 of

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8. (3 pts) Based on the volume of NaOH added in Step 9 of the Data Analysis, determine the buffering capacity of the buffered acetic acid solution. You may disregard the volume of “1 L” from the definition and refer to the volume used of the original buffer. Be sure to include the correct units.
9. (6 pts) At volumes below the volume determined in Step 9 of the Data Analysis, discuss the relative changes in pH following subsequent NaOH additions. What happened to the pH following subsequent additions of NaOH after the Step 9 volume was reached? Why? Include the titration curve and second derivative curve from the Part B Data Analysis. 10 Mendez Fall 2018 (revised Z. Baranová)
Grading Rubric – Weak Acids and Buffers PART C: Buffered Acetic Acid vs. HCl (5 pts) Table 3 : Relevant volumes and pH readings during the HCl titration of the buffer. Titration Conditions HCl added (mL) pH Initial 0 4.49 Buffering capacity reached 9.985 3.54 Equivalence point 10.95 3.10 10. (3 pts) During the addition of HCl in Part C , which buffer species reacted with the HCl? Provide the balanced formula unit equation for this reaction.
11. (3 pts) Based on the volume of HCl added in Step 14 of the Data Analysis, determine the buffering capacity of the buffered acetic acid solution. You may disregard the volume of “1 L” from the definition and refer to the volume used of the original buffer. Be sure to include the correct units.
12. (3 pts) At volumes below the volume determined in Step 14 of the Data Analysis, discuss the relative changes in pH following subsequent HCl additions. What happened to the pH following subsequent additions of HCl after the Step 14 volume was reached? Why? Include the titration curve and second derivative curve from the Part C Data Analysis.

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