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    STUDIA CHEMIA - Ediţia nr.1 din 2023  
         
  Articol:   THE STUDY OF IONIC INTERACTIONS OF POTASSIUM IODIDE IN THE VEGETABLE OIL-N,N-DIMETHYLFORMAMIDE SOLVENT BY ELECTRICAL CONDUCTIVITY MEASUREMENTS.

Autori:  SYED MUHAMMAD SAQIB NADEEM, REHANA SAEED.
 
       
         
  Rezumat:  
DOI: 10.24193/subbchem.2023.1.05

Published Online: 2023-03-27
Published Print: 2023-04-30
pp. 59-74

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The electrical and molar conductivities of potassium iodide solutions in different concentrations of sunflower oil-DMF and corn oil-DMF solvents were measured at temperatures of 303.15, 308.15, 313.15, 318.15 and 323.15 K. The electrical and molar conductivity increased with an increase in temperature while an increase in the concentration of oil in the solvent had a decreasing effect. The electrical conductivity increased while the molar conductivity decreased with an increase in the concentration of potassium iodide in the solution. The limiting molar conductivities of the potassium iodide solution evaluated by the plots of the Debye-Huckel relation were used to determine the strength of ion-ion and ion-solvent interactions. The ion-ion interaction coefficient (A) varied irregularly with temperature while the ion-solvent interaction coefficient (B) increased with temperature in a pattern characteristic of structure-breaking electrolytes. The limiting molar conductivity of potassium iodide solutions obeyed the Arrhenius model of temperature dependence.

Keywords: Vegetable oil; Electrical conductivity; N, N-Dimethylformamide (DMF), Ion-ion interaction; Ion-solvent interaction
 
         
     
         
         
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