Potentiometric Titration Study of the Temperature and Ionic Strength Dependence of the Acidity Constants of Nicotinic Acid (Niacin)

摘要

The influence of temperature (T) and ionic strength (I_m) on the stoichiometric (molality scale) acidity constants of nicotinic acid in aqueous solution was investigated by potentiometry (H~+-glass electrode). The background salt used was potassium chloride, and the temperature and ionic strength ranges covered were 283.15 K< T < 318.15 K and 0.05 mol?kg-