A 40.0 mL solution of 0.0400 M Hg2(NO3)2 was titrated with 60.0 mL of 0.100 M KI to precipitate H...

A 40.0 mL solution of 0.0400 M Hg2(NO3)2 was titrated with 60.0 mL of 0.100 M KI to precipitate Hg2I2 (Ksp = 4.6 x 10-29).

a) What volume of KI is needed to reach the equivalence point?

b) Calculate the ionic strength of the solution when 60.0 mL of KI have been added.

c) Using activities, calculate pHg2⁺² (= -log a_Hg2+2) for your answer in part (b).