Solutions in acetone. Part II. Transference numbers of potassium thiocyanate and ionic conductances in acetone at 25 °C

1971 ◽  
Vol 0 (0) ◽  
pp. 2415-2420 ◽  
Author(s):  
H. C. Brookes ◽  
M. C. B. Hotz ◽  
A. H. Spong
Keyword(s):  
Potassium Thiocyanate ◽  
Transference Numbers ◽  
Ionic Conductances

scholarly journals DC Conductivity and Transference number in pure and potassium thiocyanate-doped polyvinyl alcohol films

2019 ◽  
Vol 16 (2) ◽  
pp. 136-141
Author(s):  
N. Nagaraj ◽  
P. Mohan Babu ◽  
K. V. Ramesh Babu
Keyword(s):  
Charge Transport ◽  
Polymer Electrolyte ◽  
Transference Number ◽  
Potassium Thiocyanate ◽  
Dc Conductivity ◽  
Transference Numbers ◽  
Poly Vinyl Alcohol ◽  
Electrolyte System ◽  
Solution Cast ◽  
Cast Technique

Poly (vinyl alcohol) (PVA) – based solid electrolyte films with potassium thiocyanate (KSCN) were prepared by solution-cast technique. The pure and KSCN- doped PVA films have been investigated for the charge transport mechanism in the polymer electrolyte system by using the DC conductivity (The composition dependence and temperature dependence in 300-385K range) and transference number measurements. The graphs related to conductivity – temperature shows that an increase in conductivity with respect to rise in the temperature. At room temperature, the conductivity of the (PVA+KSCN) electrolyte is 102 times greater than that of pure PVA. The transference number data exhibit that the charge transport in this polymer electrolyte system is predominantly due to ions. The ionic transference numbers (tion) lies in the range of 0.92 to 0.99 for the films of PVA with KSCN in the wt% ratios (90:10), (80:20) and (70:30).

Transference numbers and solvation studies in n-butanol

1984 ◽  
Vol 62 (2) ◽  
pp. 303-305 ◽  
Author(s):  
J. S. Banait ◽  
K. S. Sidhu ◽  
J. S. Walia
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Transference Number ◽  
Transference Numbers ◽  
Ionic Radii ◽  
Equivalent Conductance ◽  
Solvation Numbers ◽  
Tetrabutylammonium Ion ◽  
Ionic Conductances ◽  
Bromide Ions

Transference numbers of tetrabutylammonium bromide have been measured in n-butanol at 25 °C in the concentration range 5.79 − 12.86 × 10−2 mol dm−3. The variation of transference number with concentration is negligible. The limiting transference number of tetrabutylammonium ion has been determined by the Longsworth method. Combining the limiting transference number and limiting equivalent conductance of this salt, limiting ionic conductances of tetrabutylammonium and bromide ions have been found to be 8.05 and 8.02 ohm−1 cm2 mol−1, respectively. From these values limiting ionic conductances of other univalent ions, effective ionic radii and solvation numbers have been computed. The solvation numbers of anions have been found to be more than those of cations which shows the protic nature of this solvent.

Physico-chemical studies in non-aqueous solvents. X. Conductance and solvation studies of 1 : 1 electrolytes in N,N-dimethylacetamide

1975 ◽  
Vol 28 (2) ◽  
pp. 321 ◽  
Author(s):  
RC Paul ◽  
JS Banait ◽  
SP Narula
Keyword(s):  
Potassium Thiocyanate ◽  
Transference Numbers ◽  
Size Parameter ◽  
Ionic Radii ◽  
Solvation Numbers ◽  
Physico Chemical ◽  
Conductance Data ◽  
Chemical Studies ◽  
Ionic Mobilities ◽  
Ion Size

Conductances of some 1 : 1 electrolytes have been measured in the concentration range 1-120 x 10-4 mol l-1 in N,N-dimethylacetamide at 25�. The conductance data have been analysed by Fuoss-Onsager-Skinner equations for dissociated and associated electrolytes, and limiting equivalent conductances, ion-size parameter and association constants (where appropriate) for various electrolytes have been obtained. The ion-size parameter (3.7 � 0.3Ǻ) has been found to be about the same for all the electrolytes. Alkali metal salts are fully dissociated while the substituted ammonium salts are slightly associated in this solvent. The ionic association increases with increase in the size of cations. Transference numbers of lithium chloride, potassium thiocyanate and silver perchlorate have also been measured in the concentration range 1.1-18.4 x 10-2mol l-1 in this solvent. Limiting cation transference numbers are determined from the linear plots of cation transference numbers against square root of concentration. Ionic mobilities, effective ionic radii and solvation numbers of various ions in solution have been calculated. Higher solvation numbers of cations than those of anions of comparable sizes are consistent with the aprotic nature of the solvent.

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