ISSN:
1572-8927
Keywords:
Mixed electrolytes
;
mixed solvents
;
Harned's method
;
ion-ion interactions
;
ion-solvent interactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Electromotive-force measurements of the cell Pt, H2(g, 1 atm)|HCl(m1), NH4Cl(m2), methanol(X%), Water(100−X)%|AgCl|Ag have been made at 25°C for m1+m2=1 mole-kg−1 and X=0, 10, 20, 30, 40, and 50% methanol by weight. Hydrochloric acid obeys Harned's rule in aqueous solutions, but a quadratic term is required in the mixed solvents. The Harned coefficients for the acid vary with solvent composition, and this invalidates the applicability of Harned's method for estimating activity coefficients for single electrolytes in mixed solvents. This method is described and the reason for the inapplicability of the method is discussed in terms of ion-ion and ion-solvent interactions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00662895
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