A conductometric study of dissociation of picric acid in 2-methoxyethanol and 1,2-ethanediol from -10 to 80°C

Dissociation constants of 2,4,6-trinitrophenol (picric acid) in 2-methoxyethanol and 1,2-ethanediol were measured by a conductancemethod at temperatures ranging from - 10 to 80°C. The determined constants in the two solvents are discussed andare compared on the basis of the physical properties of the solvents, which have been measured at the various temperatures. Thedissociation constants show different behaviour with the temperature in the investigated range and they are fitted by equationsof the type In K = A+BT+C/T+D In T. Furthermore, the thermodynamic functions have been evaluated and discussed