A 25. 0 mL sample of 0. 125 molL⁻¹ pyridine (Kb=1. 7×10⁻⁹ ) is titrated with 0. 100 molL⁻¹HCl.
A) Calculate the pH at 0 mL of added acid. Express your answer using two decimal places. pH = 9. 16
B) Calculate the pH at 10 mL of added acid. Express your answer using two decimal places. pH = 5. 56
C) Calculate the pH at 20 mL of added acid. Express your answer using two decimal places. pH = 4. 98
D) Calculate the pH at equivalence point. Express your answer using two decimal places. pH = 3. 24
E) Calculate the pH at one-half equivalence point. Express your answer using two decimal places. pH = 5. 23
F) Calculate the pH at 40 mL of added acid. Express your answer using two decimal places. pH = 1. 87
G) Calculate the pH at 50 mL of added acid. Express your answer using two decimal places. pH = 1. 60