The table 4.10 shows the pH variation during the titration of a 0.1000 mol L-1 NH4OH solution (Kb = 1.75 x 10-5) with a 0.1000 mol L-1 HCl solution...

The table 4.10 shows the pH variation during the titration of a 0.1000 mol L-1 NH4OH solution (Kb = 1.75 x 10-5) with a 0.1000 mol L-1 HCl solution. What is the pH when 20.00 mL of HCl solution is added?

The titration is between a weak base and a strong acid.
The equivalence point is reached when 50.00 mL of HCl solution is added.
The pH at the equivalence point is 7.00.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) II and III are correct.