ISSN:
1572-8927
Keywords:
Activity coefficients
;
emf
;
ion selective electrode
;
HCl
;
aqueous methanol mixtures
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A method to determine activity coefficients of electrolytes in mixed solvent is described which makes use of ion-selective electrode(s) (ISE) and in which a concentrated electrolyte solution is continuously added. Activity coefficients for HCl in methanol-water mixtures containing 0, 10, 20, 30, 50, 70, and 90 weight percent methanol at 25, 35 and 45°C were calculated using the Pitzer equation, and the electromotive force (emf) data of the cell: $$pH - glass electrode\backslash HCl in H_2 O - CH_3 OH\backslash AgCl - Ag$$ The experimental results agree well with literature values indicating that the proposed method is procise and reliable.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00650680
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