Thermodynamics of cadmium chloride in formamide

Abstract

The e.m.f. of the cells Cd/CdCl₂/Cl^–/AgCl/Ag(cell 1) and Cd; Hg (2 phase amalgam)/CdCl₂/Cl^–/AgCl/Ag (cell 2) has been measured using HCl and KCl solutions in formamide, at various Cl^– concentrations at 5, 10, 15, 20, 25 and 30°C. The results are used to calculate the standard potential of the Cd/CdCl₂ electrode in formamide, and to calculate ΔG and ΔH for the interaction of anhydrous CdCl₂ with formamide to form the solid solvate CdCl₂. 2½HCONH₂. The heat of this reaction has been measured calorimetrically and is in excellent agreement with that calculated from the e.m.f. data.