A MODEL FOR THE ACTIVITY COEFFICIENTS OF WATER IN THE AQUEOUS SOLUTION OF HCl-MCl_n (M=Ni, Cu, Na AND Fe) WITH CONSTANT CONCENTRATION RATIO XHCl/XMCl

金属学报(英文版), 1999, 12(3): 241-244.

A MODEL FOR THE ACTIVITY COEFFICIENTS OF WATER IN THE AQUEOUS SOLUTION OF HCl-MCl_n (M=Ni, Cu, Na AND Fe) WITH CONSTANT CONCENTRATION RATIO XHCl/XMCl_n

Q.R. Zhang , Y.G. Li and Z. Fang (Department of Chemistry , Central South University of Technology , Changsha 410083 , China)(Department of Chemistry , Central South University of Technology , Changsha 410083 , China)(Department of Chemistry , Central South University of Technology , Changsha 410083 , China)

Keywords： solution model; interchange energy; electrolyte solution

In orber to calculate the activity coefficients of water in the aqueous solution systems of double electrolytes, HCl and MCln (M=Ni, Cu,Na and Fe), a simplified regular solution model has been derived based on the assumption that the electrolytes in the aqueous solution are treated as independent particles instead of their ion forms, and that the interaction of the component pair HCl-MCln in the aqueous solution is very weak as compared with the component pairs HCl-H2O and H2 O-MCln. The interchange energies of the component pairs in the discussed systems, ωWCl-H2o, ωH2o-NiCl2,ωH2o-CuCl2, ωH2o-NaCl and ωH2O-FeCl3, have been evaluated from the experimental data to be-69800, -212600, -90550, -42450 and -198310J·mol-1.

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A MODEL FOR THE ACTIVITY COEFFICIENTS OF WATER IN THE AQUEOUS SOLUTION OF HCl-MCl_n (M=Ni, Cu, Na AND Fe) WITH CONSTANT CONCENTRATION RATIO XHCl/XMCl_n

参考文献