Thermodynamics of Iron-Ferron System

Chemical Laboratories, Birla Institute of Technology and Science, Pilani (Rajasthan)

Received 5 January 1972

The green coloured chelates formed by iron(III) with ferron have been investigated spectrophotometrically. 1 : 1, 1 : 2, and 1 : 3 chelates are formed at pH 1.5, 2.5, and 3.0 respectively. Stability constants at various temperatures have been evaluated in order to determine various thermodynamic functions as \(\bigtriangleup\) F, \(\bigtriangleup\) H, and \(\bigtriangleup\) S. Effects of dielectric constants and ionic strength have been determined. Thermodynamic stability constants have also been reported.