Calculate the pH for each of the cases in the titration of 25.0 mL of 0.170 M pyridine, C₅H₅N(aq) with 0.170 M HBr(aq). The Kb of pyridine is 1.7x10(-9). After addition of 25.0 mL of HBr.
A) 3.46
B) 4.28
C) 5.62
D) 6.91