Formic acid solvent system. II. Conductance and solvation studies of 1 : 1 electrolytes in formic acid

1977 ◽  
Vol 30 (3) ◽  
pp. 535 ◽  
Author(s):  
RC Paul ◽  
R Sharma ◽  
T Puri ◽  
R Kapoor
Keyword(s):  
Formic Acid ◽  
Solvent System ◽  
Transference Numbers ◽  
Ionic Radii ◽  
Solvation Numbers ◽  
Conductance Data ◽  
Ionic Mobilities ◽  
Sodium And Potassium ◽  
Anhydrous Formic Acid

Conductances of some 1 : 1 electrolytes have been measured in the concentration range (5-100) x 10-3 mol l-1 in anhydrous formic acid at 25�. The conductance data have been analysed by Fuoss-Shedlovsky equations. Transference numbers of sodium and potassium formates have been measured in this solvent at 25� by a modified Hittorf's method in the concentration range (3-80) x mol l-1. Ionic mobilities, effective ionic radii and solvation numbers of various ions in solution have been calculated. Solvation of cations decreases with the increase in the crystal radii of the ions.

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.

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.

Light scattering and viscosity of proteins in anhydrous formic acid

1961 ◽  
Vol 49 (152) ◽  
pp. 353-367 ◽  
Author(s):  
B. S. Harrap ◽  
E. F. Woods
Keyword(s):  
Light Scattering ◽  
Formic Acid ◽  
Anhydrous Formic Acid

Basic Chromium(III) Formate: Reaction of Chromiiim(III) Chloride with Formic Acid

1979 ◽  
Vol 34 (2) ◽  
pp. 160-162 ◽  
Author(s):  
R. C. Paul ◽  
P. Kapoor ◽  
. B. Baidya ◽  
R. Kapoor
Keyword(s):  
Formic Acid ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Title Compound ◽  
Temperature Range ◽  
Infrared Spectral ◽  
Anhydrous Formic Acid

Abstract Chromium(III) Chloride, Basic Chromium(III) Formate, IR, Thermogravimetry, Magnetic Moment Chromium(III) chloride reacts with anhydrous formic acid to give basic chromium(III) formate [Cr3O(OOCH)6(H2O)2(HCOOH)](OOCH), HCOOH. Its reactions with bases (B) give compounds of the general composition [Cr30(C00CH)6(B)3](00CH). The title compound has been characterized by infrared spectral data, temperature range (266-110K) magnetic moment and thermogravimetry.

scholarly journals On the Shift in Transference Numbers and Ionic Mobilities on Addition of Sucrose to Aqueous Electrolyte Solutions.

1969 ◽  
Vol 23 ◽  
pp. 1993-2004 ◽  
Author(s):  
Stig Fredriksson ◽  
Antti Vesala ◽  
Seija Vesala ◽  
Tarja Aalto ◽  
Per-Erik Werner ◽  
...  
Keyword(s):  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Transference Numbers ◽  
Aqueous Electrolyte Solutions ◽  
Ionic Mobilities

A new procedure for the destructuring of vegetable matter at atmospheric pressure by a catalyst/solvent system of formic acid/acetic acid.Applied to the pulping of triticale straw

2001 ◽  
Vol 14 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Hoang Quoc Lam ◽  
Yves Le Bigot ◽  
Michel Delmas ◽  
Gérard Avignon
Keyword(s):  
Formic Acid ◽  
Atmospheric Pressure ◽  
Solvent System

THE ACTION OF ANHYDROUS ACIDS ON ATP:CREATINE PHOSPHOTRANSFERASE

1962 ◽  
Vol 40 (5) ◽  
pp. 1018-1022 ◽  
Author(s):  
Florante A. Quiocho ◽  
Felix Friedberg
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Formic Acid ◽  
Sulphuric Acid ◽  
Acyl Migration ◽  
Peptide Bonds ◽  
Hydrolysis Of ◽  
Anhydrous Formic Acid

Treatment of ATP:creatine phosphotransferase with anhydrous sulphuric acid permits transposition of 24% of the threonine residues and 69% of the serine residues. Treatment with anhydrous phosphoric acid yields similar results: 41% of the threonine residues and 60% of the serine residues are rearranged. Anhydrous formic acid does not induce an N- to O-acyl migration in the protein.Non-specific hydrolysis of peptide bonds or destruction of certain amino acids that might have occurred simultaneously with rearrangement during the anhydrous sulphuric or anhydrous phosphoric acid appears to be very slight. When the protein is treated with anhydrous sulphuric acid, however, phenylalanine "disappears" almost completely from the chromatogram.

Voltammetric and chronopotentiometric studies of the quinone and hydroquinone system in anhydrous formic acid

1977 ◽  
Vol 49 (6) ◽  
pp. 806-809 ◽  
Author(s):  
Michel. Arnac ◽  
Gilles. Verboom
Keyword(s):  
Formic Acid ◽  
Anhydrous Formic Acid

Potentiometric determination of basicity constants in anhydrous formic acid

1962 ◽  
Vol 24 (12) ◽  
pp. 1667-1674 ◽  
Author(s):  
A.I. Popov ◽  
J.C. Marshall
Keyword(s):  
Formic Acid ◽  
Potentiometric Determination ◽  
Anhydrous Formic Acid
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