Answer
Acidity is in the order;
acetic acid < chloroacetic acid < p-toluenesulfonic acid
Work Step by Step
The pKa value for
p-toluenesulfonic acid is -1.34
acetic acid is 4.75
chloroacetic acid is 2.87
Presence of electron withdrawing group increases the acidity. So, acidity of chloroacetic acid is stronger than acetic acid