ION PAIR DISSOCIATION OF SOLVATED BASES AND BASE PERCHLORATES IN ANHYDROUS ACETIC ACID

A simple Potentiometric method was devised for the determination of ion pair dissociation constants for representative solvated bases and their Perchlorate salts in anhydrous acetic acid as the solvent. Sodium acetate and sodium Perchlorate were the reference solutes used in this procedure requiring emf measurements on separate solutions of the base and the half-neutralized base. Trends in the Perchlorate salt dissociation constant as a function of the basicity constant were correlated with the Bruckenstein-Kolthoff theory of acid-base neutralization in anhydrous acetic acid. It was found that the value of the base Perchlorate dissociation constant is always larger than the basicity constant, and their ratio ranges from 10:1 for strong bases to 106:1 for very weak bases. © 1968, American Chemical Society. All rights reserved.