Liquid Junction Potential between Electrolyte Solutions in Different Solvents: Some Consideration on the Component Due to Solvent–Solvent Interactions

2010 ◽  
Vol 83 (1) ◽  
pp. 39-41 ◽  
Author(s):  
Kosuke Izutsu
Keyword(s):  
Electrolyte Solutions ◽  
Liquid Junction Potential ◽  
Liquid Junction ◽  
Solvent Interactions ◽  
Junction Potential ◽  
Solvent Solvent

Liquid junction potentials in electrochemical cells involving a dissimilar solvent junction

1974 ◽  
Vol 27 (8) ◽  
pp. 1617 ◽  
Author(s):  
JW Diggle ◽  
AJ Parker
Keyword(s):  
Propylene Carbonate ◽  
Electrochemical Cells ◽  
Liquid Junction Potential ◽  
Liquid Junction ◽  
Solvent Interactions ◽  
Liquid Junction Potentials ◽  
Junction Potential ◽  
Solvent Solvent

The liquid junction potential at a number of dissimilar solvent junctions has been determined within the framework of the tetraphenylarsonium tetraphenylborate extrathermodynamic assumption. The junctions investigated were H2O/solvent S, MeCN/solvent S and propylene carbonate (pcar)/solvent S. The liquid junction potentials obtained have primarily been related to solvent-solvent interactions at the junction, being, for water, lowest for an alcohol /H2O junction (10 mV) and the greatest for a dipolar aprotic/H20 junction (100-200 mV).

An Improved Equation for the Liquid Junction Potential at the Interface of Different Solvents

1992 ◽  
Vol 45 (10) ◽  
pp. 1633 ◽  
Author(s):  
A Berne ◽  
C Kahanda ◽  
O Popovych
Keyword(s):  
Mixed Solvent ◽  
Electrolyte Solutions ◽  
Transport Numbers ◽  
Liquid Junction Potential ◽  
Aqueous Methanol ◽  
Liquid Junction ◽  
Chemical Potentials ◽  
Solvent Dependence ◽  
New Equation ◽  
Junction Potential

The component of the liquid-junction potential due to the diffusion of ions across an interface of electrolyte solutions in different solvents was formulated by taking into account the solvent dependence of the transport numbers, t, and of the chemical potentials of ions in the interphase region as determined from experimental data on their variation in the mixed-solvent compositions. The new equation was applied to NaCl/NaCl and HCl/HCl junctions between water and methanol-water solvents over the entire solvent range. Significant differences between the results obtained with the new equation and the old formulation, which treated the transport numbers as solvent-independent, were observed only for the HCl junctions involving 90-100 wt % aqueous methanol, where tH exhibits a sharp minimum as a function of the solvent composition.

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