The partial molar volumes of aqueous metal cations: their prediction and relation to volumes of activation for water exchange

1983 ◽  
Vol 61 (3) ◽  
pp. 473-480 ◽  
Author(s):  
Thomas W. Swaddle ◽  
Mark K. S. Mak
Keyword(s):  
Molar Volume ◽  
Coordination Number ◽  
Water Exchange ◽  
Partial Molar Volumes ◽  
Salt Solutions ◽  
Physical Origin ◽  
Molar Volumes ◽  
Density Measurements ◽  
Aqueous Ions ◽  
Perchlorate Salt

Partial molar volumes [Formula: see text] of the Fe2+, Ni2+, Fe3+, Cr3+, Rh3+, and M(NH3)5OH3+ (M = Cr, Co, Rh, Ir) aqueous ions have been obtained by extrapolation from density measurements at 298.15 K on the perchlorate salt solutions containing added HClO4 where necessary to suppress hydrolysis or oxidation. The values for these high-spin aqua-ions and others in the literature can be represented satisfactorily for ionic charges z = 1 through 4 by[Formula: see text]where [Formula: see text] is the absolute partial molar volume in cm3 mol−1 of Mz+(aq) relative to [Formula: see text] for H+(aq), and r is the Shannon radius in pm of Mz+ with coordination number nc. Volumes of activation ΔVex* for water exchange correlate inversely with [Formula: see text] within the series M2+(aq) and M(NH3)5OH23+(aq) at least, allowing predictions of ΔVex* to be made from [Formula: see text] or the above equation. The physical origin of these correlations is considered.

Partial Molar Volumes of Some Multicharged Electrolytes in Aqueous Dimethylformamide at Various Temperatures

1998 ◽  
Vol 63 (4) ◽  
pp. 507-514
Author(s):  
Madan L. Parmar ◽  
Ch. V. Nageshwara Rao ◽  
Suresh Chand Attri
Keyword(s):  
Partial Molar Volumes ◽  
Water Systems ◽  
Molar Volumes ◽  
Density Measurements ◽  
Solution Density ◽  
Aluminium Sulfate ◽  
Ion Interactions

Partial molar volumes of ammonium aluminium sulfate and potassium aluminium sulfate in DMF-water mixtures (5-20 wt.% of DMF) have been determined from solution density measurements at various temperatures and electrolyte concentrations. The data were evaluated by using Masson equation and the obtained parameters were interpreted in terms of ion-solvent and ion-ion interactions. Both electrolytes have been found to act as the structure makers/promotors in DMF-water systems.

scholarly journals Volumetric studies of alcohols in water and aqueous micelle solutions of cetyltrimethylammonium bromide

1970 ◽  
Vol 24 (2) ◽  
pp. 143-157 ◽  
Author(s):  
T Parvin ◽  
M Alauddin ◽  
M Rokonuzzaman
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Cetyltrimethylammonium Bromide ◽  
Surfactant Concentration ◽  
Partial Molar Volumes ◽  
Chemical Society ◽  
Volume Data ◽  
Palisade Layer ◽  
Molar Volumes ◽  
Partial Molar Expansibilities

The volumetric properties of 1-propanol, cyclohexanol and butoxyethanol in water and CTAB water mixtures have been studied. The apparent molar volumes of 1-propanol, cyclohexanol and butoxyethanol in water and in aqueous solutions of CTAB were determined from density data. The partial molar volumes of the alcohols in water and aqueous micelle solutions at infinite dilution, V20(mic) were obtained from apparent molar volume data and compared with the corresponding values. The standard partial molar expansibilities, E20(mic) of the solubilizates were evaluated from V20(mic) data at various temperatures. The volumetric studies of alcohols in CTAB micelles indicate that alcohols on the average are preferentially solubilized in the palisade layer of the micelle and increasing amount of each is transferred more deep into the palisade layer of the micelle with increasing surfactant concentration and temperature. The results of standard partial molar volume, V20 and standard partial molar expansibilities, E20 are reported and discussed. DOI: http://dx.doi.org/10.3329/jbcs.v24i2.9703 Journal of Bangladesh Chemical Society, Vol. 24(2), 143-157, 2011

Molten salt mixtures. XI. Integral and partial molar volumes in the molten salt systems PbCl2 + NaCl, PbCl2 + RbCl, PbCl2 + CsCl, CdCl2 + RbCl, and CdCl2 + CsCl

1966 ◽  
Vol 19 (9) ◽  
pp. 1591 ◽  
Author(s):  
H Bloom ◽  
PWD Boyd ◽  
JL Laver ◽  
J Wong
Keyword(s):  
Molten Salt ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Binary Systems ◽  
Partial Molar Volumes ◽  
Complex Ions ◽  
Molar Volumes ◽  
Temperature Range ◽  
Salt Mixtures ◽  
Salt Systems

The densities of molten PbCl2, CsCl, and RbCl and of the molten salt systems PbCl2 + NaCl, PbCl2 + RbCl, PbCl2 + CsCl, CdCl2 + RbCl, and CdCl, + CsCl have been measured to an accuracy of �0.1% by an Archimedean method over a considerable temperature range. Integral and partial molar volume isotherms have been constructed for the above binary systems and are interpreted to show that complex ions are formed in all but the PbCl2+NaCl system.

scholarly journals Utilisation d'une méthode d'ajouts pour la détermination précise des volumes molaires partiels des constituants dans un solvant mixte. Application au système eau–méthanol

1982 ◽  
Vol 60 (9) ◽  
pp. 1155-1161 ◽  
Author(s):  
Pierre Letellier ◽  
Michel Biquard
Keyword(s):  
Binary Mixture ◽  
Molar Volume ◽  
Polynomial Function ◽  
Partial Molar Volumes ◽  
Direct Access ◽  
Polynomial Functions ◽  
Molar Volumes ◽  
Method Of Calculation ◽  
Methanol System

The determination of partial molar volumes of each component in a binary mixture is usually the result of the derivation of the polynomial function which describes the whole excess curve. The accuracy of the present available densimeters (vibrating densimeter Piker type) allows direct access to the values of partial molar volume by a method requiring successive additions of various components. The method of calculation is discussed in this paper and applied for the water–methanol system. Partial molar volumes of water and methanol are calculated for different phase compositions, and each variation is described by polynomial functions which are related to each other by thermodynamic rules. This technique may be extended to mixtures which contain different solvents and highly concentrated solutes.

A partial-molar volume study of electrolytes in propylene carbonate-based lithium battery electrolyte solutions at 298.15 K

2002 ◽  
Vol 80 (7) ◽  
pp. 753-760 ◽  
Author(s):  
Jianji Wang ◽  
Yang Zhao ◽  
Kelei Zhuo ◽  
Ruisen Lin
Keyword(s):  
Molar Volume ◽  
Propylene Carbonate ◽  
Partial Molar Volume ◽  
Lithium Battery ◽  
Preferential Solvation ◽  
Partial Molar Volumes ◽  
Scaled Particle Theory ◽  
Solvent Mixtures ◽  
Particle Theory ◽  
Molar Volumes

Apparent molar volumes (V2, ϕ ) and standard partial-molar volumes (V20, ϕ ) of LiClO4 and LiBr at 298.15 K have been determined from precise density measurements in solvent mixtures of propylene carbonate (PC) with dimethylformamide (DMF), tetrahydrofuran (THF), acetonitrile (AN), and methyl formate (MF). The scaled particle theory is used to calculate the contributions of the cavity formation and the electrolyte-solvent interactions to the standard partial-molar volumes. It is shown that V20, ϕ is strongly dependent on the nature of the solvents, and the trends in V20, ϕ with composition of the solvent mixtures are determined by the interaction volumes of electrolytes with solvents. The results are discussed in terms of ionic preferential solvation, packing effect of solvents in the solvation shell, and electrostriction of solvents by ion.Key words: partial-molar volume, scaled particle theory, lithium salts, propylene carbonate, solvent mixtures, lithium battery electrolytes.

scholarly journals Thermoacoustic, Volumetric, and Viscometric Investigations in Binary Liquid System of Cyclohexanone with Benzyl Benzoate at T = 308.15, 313.15, and 318.15 K

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Sk. Md Nayeem ◽  
M. Kondaiah ◽  
K. Sreekanth ◽  
D. Krishna Rao
Keyword(s):  
Molar Volume ◽  
Partial Molar Volume ◽  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Isentropic Compressibility ◽  
Liquid Mixtures ◽  
Liquid System ◽  
Benzyl Benzoate ◽  
Molar Volumes ◽  
Binary Liquid

Ultrasonic velocities (u), densities (ρ), and viscosities (η) of binary liquid mixtures of cyclohexanone with benzyl benzoate, including pure liquids, over the entire composition range have been measured at 308.15 K, 313.15 K, and 318.15 K. Using the experimental results, parameters such as molar volume (Vm), isentropic compressibility (ks), intermolecular free length (Lf), acoustic impedance (Z), internal pressure (πi), enthalpy (H), Gibbs free energy of activation of viscous flow (G*E), and excess/deviation properties of these including partial molar volumes (V-m,1 and V-m,2), excess partial molar volumes (V-m,1E and V-m,2E), partial molar volume of the components at infinite dilution (V-m,1∞, V-m,2∞), and excess partial molar volume at infinite dilution (V-m,1E,∞and V-m,2E,∞) have been computed. The observed negative values of VmE, Δks, LfE, and πiE and positive values of zE, HE, ΔG*E, Δη, and Δu for all the liquid mixtures studied clearly indicate the presence of strong dipole-dipole-type interactions, fitting of smaller molecules into bigger molecules. Further theoretical values of sound velocity and viscosity in the mixtures have been evaluated using various theories and have been compared with experimental values to verify the applicability of such theories to the systems studied.

Electrostriction volumes of α-amino acids from density measurements in water and in aqueous HCl and NaOH solutions at 25 °C

1993 ◽  
Vol 71 (12) ◽  
pp. 2150-2154 ◽  
Author(s):  
M. Abbate ◽  
G. Castronuovo ◽  
V. Elia ◽  
S. Puzziello
Keyword(s):  
Amino Acids ◽  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Sodium Hydroxide ◽  
Volume Change ◽  
Pure Water ◽  
Partial Molar Volumes ◽  
Molar Volumes ◽  
Density Measurements ◽  
Alkyl Chains

The values of the limiting partial molar volumes, [Formula: see text], for some α-amino acids bearing alkyl chains, in pure water and in aqueous solutions of hydrochloric acid and sodium hydroxide, have been obtained from density measurements. From these data it is possible to determine the volume change, ΔVZW, due to the formation of the amphionic molecule from the corresponding neutral molecule.

scholarly journals VOLUMETRIC PROPERTIES OF SOLUTIONS OF DIMETHYLSULFONE IN ETHANOL-WATER MIXTURE AT TEMPERATURES RANGE OF 298.15-323.15 K

2017 ◽  
Vol 60 (7) ◽  
pp. 27
Author(s):  
Heghine H. Ghazoyan ◽  
Shiraz A. Markaryan
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Molar Fraction ◽  
Partial Molar Volumes ◽  
Sulfur Cycle ◽  
Apparent Molar Volumes ◽  
Volumetric Properties ◽  
Water Mixture ◽  
Molar Volumes ◽  
Volumetric Behavior

This paper studies volumetric properties of ternary dimethylsulfone-ethanol-water systems. The biomedical and environmental significance for the fundamental investigations of aqueous solution of dimethylsulfone and influences of third component on volumetric behavior of this system arises from several reasons. In the global sulfur cycle dimethylsulfide is converted to dimethylsulfone leading to an annual atmospheric production of some million tones of dimethylsulfone, much of which would be deposited in rain and snow. In addition, dimethylsulfone has been extensively studied from a medical point of view. It was established that dimethylsulfone is contained in small amounts in human blood and urine. Also of interest is that methionine is transformed into dimethylsulfone in living organisms. In this work densities of solution of dimethylsulfone in ethanol-water mixtures with various compositions have been measured over available concentration range. As it is evident from experimental data, the increase in a temperature leads to the reduction of density. The apparent and partial molar volumes of solutions were determined over the 298.15–323.15K temperature range. As it follows from these data, the apparent molar volumes increase with increasing of temperature. The influence of ethanol on the volumetric behavior has been taken into account by changing the apparent molar volume compared with the apparent molar volume of the binary aqueous solutions of DMSO2. It is found also the effect of the amount of ethanol on the volumetric properties of these solutions. It is interesting that the effect of ethanol on the values of apparent molar volumes does not change monotone with increasing in quantity of ethanol in ethanol-water mixture. In dimethylsulfone+(ethanol-water) solutions the partial molar volume of dimethylsulfone increases when quantity of ethanol in ethanol-water mixture more than 0.5 molar fraction. The observed phenomena are explained by the presence of competition of intermolecular interactions. In the DMSO2-ethanol-water system the strongest interaction between ethanol and water molecules leads to the increase in partial molar volumes for DMSO2.For citation:Ghazoyan H.H., Markaryan S.A. Volumetric properties of solutions of dimethylsulfone in ethanol-water mixture at tempe-ratures range of 298.15-323.15 K. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 27-33.

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