Phase Diagram of Ternary Magnesium Acetate-Acetic Acid-Water System at 298.1 and 333.1 K

Abstract

In this investigation, the mutual solubilities for the ternary Mg(CH 3 COO) 2 -CH 3 COOH-H 2 O system were determined at 298.1 and 333.1 K. Two partial isothermal phase diagrams for this ternary system were constructed on the basis of the measured solubilities, one at 298.1 K and the other at 333.1 K. At 298.1 K, two solid phases were formed and confirmed by the Schreinemaker's wet residue method, and the two were identified as 2Mg(CH 3 COO) 2 AE3CH 3 COOHAE3H 2 O and Mg(CH 3 COO) 2 AE4H 2 O. However, only one solid phase, Mg(CH 3 COO) 2 AE4H 2 O was formed in the ternary Mg(CH 3 COO) 2 -CH 3 COOHAEH 2 O system at 333.1 K. The solubilities of Mg(CH 3 COO) 2 in water-CH 3 COOH solutions increased with increasing temperature.