Rather than calculate the pH for different volumes of titrant, a titration curve can be established by calculating the volume of titrant required to reach certain pH values. Determine the volumes of 0.100 M NaOH required to reach the following pH values in the titration of 20.00 mL of 0.150 M HCl: pH = 

(a) 2.00;

(b) 3.50; 

(c) 5.00; 

(d) 10.50; 

(e) 12.00. 

Then plot the titration curve.