Nonaqueous Electrolyte Systems. Transport Behavior in Dimethyl Sulfoxide. II. Viscosity Studies.
Interim technical rept. no. 4,
CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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Viscosity of NaClO4, NaSCN, NaBPh4, i-amyl3BuNBPh4, and CF3SO3Na in DMSO were determined over a concentration range 0.001 M to near saturation and temperature range 25 to 50C. The viscosity data were analyzed with the Jones-Dole equation up to approximately 0.1 M. Ionic viscosity B coefficients were interpreted by the Einstein equation for viscosity to obtain the effective ionic radii for the ions. i-amyl3BuN, BPh4-, and Na ions have spherical kinetic entities with effective radii of 4.90A, 4.90A, and 3.83A respectively in viscous flow. Na is solvated. CF3SO3-, SCN-, and C104- are unsolvated in DMSO. Effective ionic radii obtained from the B coefficients are insensitive to temperature for the ions. The activation energy for viscous flow for the electrolyte solutions was interpreted by the activated rate process. The results show that i-amyl3BuN, BPh 4-, and the Na ions present obstruction while CF3SO3- and SCN- ions present little or no influence on the viscous flow. The ClO4- ion appears to be a structure breaker in DMSO and tends to lower the activation energy for viscous flow in the dilute concentration range. Author
- Physical Chemistry
- Electrochemical Energy Storage