Interaction in aqueous systems containing indium trichloride, hydrogen sulfide, and hydrochloric acid

The Gibbs energy of formation and solubility product (SP) of crystalline in dium(III) sulfide were refined using experimental values of alpha -In2S3 so lubility in hydrochloric solutions: DeltaG(f , 298)(0) In2S3 = -351.96 +/- 5.87 kJ/mol and logSP In2S3 = -75.6 (mu = 0, T = 25 degreesC). The equilibr ium composition of the InCl3-HCl-H2S-H2O system at 25, 50, and 75 degreesC, a hydrogen sulfide partial pressure from 1 to 10(2) kPa, and a hydrochlori c acid concentration of 0.01-0.5 mol/kg H2O were determined using physicoch emical computer simulation. The diagrams characterizing the solute state of indium in hydrochloric solutions were constructed.