Thermochemical Study of the Complex Formation of Mercury(II) with Nitrilotriacette Acid in an Aqueous Solution

摘要

The formation constant of the Hg(Nta)_2~(4-) complex, where Nta~(3-) is the nitrilotriacetate ion, is determined by pH-metric titration at 298.15 K and ionic strength I=0.5 (KNO3) (logβ=21.49 ± 0.10). The thermal effects for the formation of the Hg(NTa)_(i2-3i) complexes (i = 1,2) are determined by a direct calorimetric method (-56.69 + 1.04 and -85.88 ± 1.32 kJ/mol for i = 1 and 2, respectively).