Question

What is the pH in titration of 100 ml 0.1 M benzoic acid with 0.02 M NaOH at half equivalance point?

a.)4.2

b.)9.8

c.)3.24

d.)7

Answer 1

We know that the $pK_a$ value for benzoic acid is 4.2

Hence, $pH = pK_a = 4.2$