General trends in concentration and temperature behavior of equivalent conductance of N,N-diallylammonium polymers aqueous solutions: Effect of counterion nature and amine structure

2017 ◽  
Vol 59 (1) ◽  
pp. 141-148 ◽  
Author(s):  
L. M. Timofeeva ◽  
I. V. Balakaeva ◽  
A. S. Lileev ◽  
Yu. A. Simonova ◽  
A. K. Lyashchenko
Keyword(s):  
Aqueous Solutions ◽  
Temperature Behavior ◽  
Equivalent Conductance ◽  
Amine Structure ◽  
Counterion Nature

STUDIES ON DICYANOTRIAZOLE: I. THE CONDUCTANCE OF DILUTE AQUEOUS SOLUTIONS OF DICYANOTRIAZOLE AT 25 °C.

1942 ◽  
Vol 20b (8) ◽  
pp. 161-167 ◽  
Author(s):  
E. G. Taylor
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Dissociation Constant ◽  
Experimental Studies ◽  
Equivalent Conductance ◽  
A Value ◽  
Dilute Aqueous Solution ◽  
Dilute Aqueous Solutions

Previous experimental studies of dicyanotriazole have resulted in statements that the compound is an acid comparable in strength with the strong mineral acids.In the present work, measurements of the equivalent conductance of dicyanotriazole in dilute aqueous solution give the dissociation constant of the acid as 3.378 × 10−2 at 25 °C., thus showing it to be an acid possessing about the same strength as dichloracetic acid.The limiting equivalent conductance of dicyanotriazole at 25 °C. is 384.9. The earlier work gave a value of 397.44.

Aminolysis of Phenyl Acetates in Aqueous Solutions. VII.1Observations on the Influence of Salts, Amine Structure, and Base Strength

1967 ◽  
Vol 89 (9) ◽  
pp. 2106-2121 ◽  
Author(s):  
Thomas C. Bruice ◽  
Alain. Donzel ◽  
Robert W. Huffman ◽  
Anthony R. Butler
Keyword(s):  
Aqueous Solutions ◽  
Amine Structure ◽  
Base Strength

scholarly journals Upper Critical Solution Temperature Behavior of pH-Responsive Amphoteric Statistical Copolymers in Aqueous Solutions

ACS Omega ◽  
2021 ◽  
Vol 6 (13) ◽  
pp. 9153-9163
Author(s):  
Komol Kanta Sharker ◽  
Yusuke Shigeta ◽  
Shinji Ozoe ◽  
Panittha Damsongsang ◽  
Voravee P. Hoven ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Temperature Behavior ◽  
Solution Temperature ◽  
Ph Responsive ◽  
Critical Solution Temperature ◽  
Upper Critical Solution Temperature

THE ELECTRICAL CONDUCTANCES OF AQUEOUS SOLUTIONS OF SILVER NITRATE AND OF AMMONIUM NITRATE AT THE TEMPERATURES 221.7 °C. AND 180.0 °C, RESPECTIVELY

1954 ◽  
Vol 32 (12) ◽  
pp. 1051-1060 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
M. E. Bednas ◽  
J. T. Herron
Keyword(s):  
Aqueous Solutions ◽  
Silver Nitrate ◽  
Molten Salt ◽  
Ammonium Nitrate ◽  
Molten State ◽  
Equivalent Conductance ◽  
Electrical Conductances ◽  
Straight Line

The specific and equivalent conductances (which also involve the densities) of aqueous solutions of silver nitrate and of ammonium nitrate, ranging in concentration from 0.1 M to that of the pure molten salt, have been determined at temperatures of 221.7 °C and 180.0 °C, respectively. It has been found that when the equivalent conductance is plotted against logarithm of the concentration, a straight line is obtained in the region of concentrations greater than about 6 M or less. Hence the equivalent conductance can be calculated from the relation[Formula: see text]where D = the slope and Λa = equivalent conductance at the limiting experimental concentration, Ca (in the molten state).

TRANSFERENCE NUMBERS AND CONDUCTANCES IN CONCENTRATED SOLUTIONS: SILVER NITRATE AND SILVER PERCHLORATE AT 25.00 °C

1959 ◽  
Vol 37 (12) ◽  
pp. 1959-1963 ◽  
Author(s):  
A. N. Campbell ◽  
K. P. Singh
Keyword(s):  
Aqueous Solutions ◽  
Silver Nitrate ◽  
Transference Number ◽  
Transference Numbers ◽  
Concentrated Solutions ◽  
Equivalent Conductance ◽  
Ion Formation ◽  
Silver Perchlorate ◽  
Complex Ion

The transference numbers, equivalent conductances, densities, and viscosities of aqueous solutions of silver nitrate and of silver perchlorate have been determined from a concentration of 0.1 M up to 7.6 M, for silver nitrate, and up to 5.6 M for silver perchlorate. In both cases the cation transference number increases considerably with increasing concentration. Certain anomalies in the results for silver perchlorate raise the possibility of complex ion formation here. Similar anomalies appear in the behavior of equivalent conductance with respect to concentration.The results of the conductance measurements have been compared with the values calculated from the equations of Wishaw and Stokes and of Falkenhagen and Leist.

scholarly journals Temperature Behavior of Aqueous Solutions of Poly(2-Oxazoline) Homopolymer and Block Copolymers Investigated by NMR Spectroscopy and Dynamic Light Scattering

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1879
Author(s):  
Rafał Konefał ◽  
Peter Černoch ◽  
Magdalena Konefał ◽  
Jiří Spěváček
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Aqueous Solutions ◽  
1H Nmr ◽  
Conformational Changes ◽  
Diblock Copolymers ◽  
Relaxation Times ◽  
Temperature Behavior ◽  
Copolymer Composition

1H NMR methods in combination with dynamic light scattering were applied to study temperature behavior of poly(2-isopropyl-2-oxazoline) (PIPOx) homopolymer as well as PIPOx-b-poly(2-methyl-2-oxazoline) (PMeOx) and poly(2-ethyl-2-oxazoline) (PEtOx)-b-PMeOx diblock copolymers in aqueous solutions. 1H NMR spectra showed a different way of phase transition for the main and side chains in PIPOx-based solutions. Additionally, the phase transition is irreversible for PIPOx homopolymer and partially reversible for PIPOx-b-PMeOx copolymer. As revealed by NMR, the phase transition in PEtOx-based copolymers solutions exists despite the absence of solution turbidity. It is very broad, virtually independent of the copolymer composition and reversible with some hysteresis. Two types of water molecules were detected in solutions of the diblock copolymers above the phase transition—“free” with long and “bound” with short spin–spin relaxation times T2. NOESY spectra revealed information about conformational changes observed already in the pre-transition region of PIPOx-b-PMeOx copolymer solution.

scholarly journals THE CONDUCTANCES OF AQUEOUS SOLUTIONS OF LITHIUM CHLORATE AT 25.00 °C. AND AT 131.8 °C.

1958 ◽  
Vol 36 (6) ◽  
pp. 1004-1012 ◽  
Author(s):  
A. N. Campbell ◽  
W. G. Paterson
Keyword(s):  
Aqueous Solutions ◽  
Relative Viscosity ◽  
Specific Conductance ◽  
Experimental Results ◽  
Equivalent Conductance ◽  
Versus Concentration

The conductances, densities, and viscosities of aqueous solutions of lithium chlorate have been obtained over the complete range of concentration at 131.8 °C. and up to saturation (and somewhat beyond) at 25.00 °C. The curve of specific conductance versus concentration passes through a maximum which does not shift noticeably in composition with change in temperature. There are no minima on the curves of equivalent conductance versus concentration. The relative viscosity of the solutions decreases with rise in temperature; this is the reverse of the effect usually observed.The experimental results have been compared with the calculated results, obtained by the use of the equations of Wishaw and Stokes and of Falkenhagen.

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