Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5mL and 7.5mL of titrant,
a) in the titration of a 10mL aliquot of standard 0.1500M TRIS base (Kb=1.2x10^-6) (in beaker) with 0.1000M HCl (in buret).
b) in the titration of a 10mL aliquot of 0.1500M NaOH (in buret) with standard 0.1000M HCL (in buret).
Hint: you need to calculate the pH at the 5 and 7.5mL points in each of the two titrations.