The lab sheet says the following :
This reaction is carried out in glacial (anhydrous) acetic acid as the solvent. The acetic acid reacts with 2, 6-dimethylaniline to establish an equilibrium between it and its acetate salt.
What is the purpose of establishing an equilibrium between 2,6-dimethylaniline and its salt here?
EDIT: This is the source of the quoted text & the procedure to synthesize lidocaine : https://tigerweb.towson.edu/jdiscord/www/332_lab_info/summer2016chem332labs/webexpt_lidocaine_a.pdf