The ionic free energy and enthalpy of In3+ ion, and some other properties of indium trichloride

Abstract

The following properties have been investigated: the standard ionic free energy and ionic enthalpy of formation of In3+ ion, in water at 25 °C. They are: ΔG0 = −22.9 ± 0.2 kcal mol−1, ΔH0 = −57.8 ± 0.2 kcal mol−1. The entropy of formation of InCl3(aq) has also been determined.In addition, the partially miscible systems indium trichloride – ethyl ether – water, and indium trichloride – n-butyl alcohol – water have been investigated.A solution of indium trichloride causes the inversion of cane sugar. On the assumption that this is due to hydrolysis, the hydrolysis constant has been calculated.