STUDIES ON GUM JEOL (LANNEA GRANDIS, ENGLER), PART VIII. INTERACTION OF JEOLIC ACID WITH ACIDS AND BASES

The jeolin acid behaves like arable acid (already reported) in its interaction with bases, acids and neutral salts, the difference being essentially in the degree in which the effects appear. It is e. monobasic acid, having an equivalent weight of 1200, and dissociatimconstant of the order of 10-4 i.e., of weak character, although its poten­tiometric titration curve is like that of HCl. Total acidity varies with the nature of the cation used for titration. It shows reserve acidity in its interaction with acids and the existence of base-exchange when treated with neutral salts