Grading Rubric – Weak Acids and Buffers
PART C: Buffered Acetic Acid vs. HCl
: Relevant volumes and pH readings during the HCl
titration of the buffer.
HCl added (mL)
During the addition of HCl in
, which buffer species reacted with the HCl?
Provide the balanced formula unit equation for this reaction.
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.
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
the Step 14 volume was reached? Why?
Include the titration curve and second derivative curve from the Part C Data Analysis.