Consider the titration of 50ml of 0.10M pyridine (C5H5N,Kb=1.7*10^-9) with 0.10M HCl. What is the pH of the solution at the following points along the titration curve:
1) Before any titrant is added
2) After 15ml of titrant is added
3) After 25ml of titrant is added
4) After 50ml of titrant is added
5) After 60ml of titrant is added