Thermodynamic Study of Zn(II)-Glycinamide Complex Formation by Spectrophotometric Method in Various Temperatures and pH = 4, Ionic Strength = 0.1 mol L-1

Abstract

The formation constants of Zn(II)-glycinamide system were determined in buffer solution, pH = 4.0 (I = 0.1 mol L^-1 in NaClO₄ at 10, 15, 20, 25, 30 ºC) using UV-Visible spectrophotometric method. The optical absorption spectra of Zn(II)-glycinamide system were analyzed in order to obtain formation constants and stoichiometries based on SQUAD software. Determining the formation constants at various temperatures enabled us to calculate some thermodynamic parameters as K, DGº, DHº and DSº related to the considered complexes.