Problem- The pKb values for bibasic base B are pKb1= 2.10 and pkB2= 7.39, calculate the pH at the flowing points in titration of 50.0mL of a .55M B with .55M HCl.
i) Before any addition of HCl
ii) After adding 25mL HCl
iii) After adding 50mL HCl
iv) After adding 75mL HCl
v) After adding 100mL HCl
Here is the problem which I am struggling on, please help me