4. Calculate the pH of a 0.050M solution of the weak base pyridine ( C5H5N ) if it has Kb = 1.7 x 10-4.

Balanced equation: C5H5N (aq) + H2O (l) HC5H5N+ (aq) + OH- (aq)

Use an I.C.E. table to determine the initial, change and equilibrium concentrations for each species.

C5H5N (aq) HC5H5N+ (aq) OH- (aq)
INITIAL
CHANGE
EQUILIBRIUM
What are the initial concentrations of each species?
a) 0.050M, 0M, 0M
b) 0M, 0.050M, 0M
c) 0.050M, 0.050M, 0.050M
d) 0.050M, 0.050M, 0M