Figure 2: Titration curve showing the change in pH following the titration of acetic acidwith NaOH during a second trial.3A. M. Bohnsack Spring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and BuffersFigure 3: Titration curve showing the change in pH following the titration of acetic acidwith NaOH during a third trial.Figure 4: Titration curve showing the change in pH following the titration of bufferedacetic acid with NaOH.4A. M. Bohnsack Spring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and BuffersFigure 5: Titration curve showing the change in pH following the titration of bufferedacetic acid and HCl. Figure 6: Second derivative curve showing the relationship between the volume (mL) ofNaOH added during the titration of acetic acid to discover its equivalence point. 5A. M. Bohnsack Spring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and BuffersFigure 7: Second derivative curve showing the relationship between the volume (mL) ofNaOH added during the titration of acetic acid to discover its equivalence point during asecond trial. Figure 8: Second derivative curve showing the relationship between the volume (mL) ofNaOH added during the titration of acetic acid to discover its equivalence point during athird trial. 6A. M. Bohnsack Spring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and BuffersFigure 9: Second derivative curve showing the relationship between the volume (mL) ofNaOH added during the titration of buffered acetic acid to discover its equivalence.Figure 10: Second derivative curve showing the relationship between the volume (mL) ofHCl added during the titration of buffered acetic acid to discover its equivalence. (1 pt each)Titration curves (5) are included and are properly labelledand with captions.(1 pt each)Second derivative curves (5) are included and are properly labelledand with captions.7A. M. Bohnsack Spring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and BuffersDiscussion Questions(Data Analysis calculations are detailed below)1.(4 pts) Using the average pH at the half-equivalence point from the acetic acid titrations(Table 1), determine the pKaof the acetic acid solution. How was the pKadetermined?Include the three titration curves and three second derivative curves from the Part AData Analysis.