Ultrasonic studies of electrolyte solutions. Part II. Compressibilities of electrolytes

Allam, D. S.; Lee, W. H.

doi:10.1039/j19660000005

Cited by 29 publications

(9 citation statements)

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“…For KF and NaClOi solutions there are only adiabatic compressibility data available at 20 °C. These have been converted to isothermal compressibilities at 20 °C according to the relationship given in ref 35. ß appears to vary very little, if at all, with temperature.36 '37 Limiting apparent molar volumes of the esters ( ") have been used for Vn in calculations of log 7n according to eq 1.…”

Section: Resultsmentioning

confidence: 99%

Activity coefficients of alkyl acetates in concentrated electrolyte solutions

Cross¹,

McTigue²

1976

J. Phys. Chem.

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The activity coefficients of methyl acetate (MeOAc), ethyl acetate (EtOAc), n-propyl acetate (n-PrOAc), n-butyl acetate (n-BuOAc), and n-pentyl acetate (n-PeOAc) have been measured at 25 °C in concentrated aqueous solutions of electrolytes using the distribution technique. The salts used were LiCl, NaCl, KC1, CsCl, KF, KBr, NaNOg, and NaC104. In general, the results obtained are as might be expected. A mechanistic explanation is given of the trends observed and unexpected features in the data are explained with the aid of some assumptions regarding the nature of ionic hydration. The apparent molar volumes of MeOAc have also been determined over the full range of molalities for each of the salts used in the activity coefficient determinations. These measurements are then used in conjunction with thermodynamic data for the salt solutions (from the literature) to calculate the MeOAc activity coefficients according to the expanded McDevit and Long equations developed in an earlier publication. Similar, but less accurate calculations have also been done for the activity coefficients of the larger esters. In these cases, apparent molar volumes were determined only in water. The calculations are found to have mixed success.

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Section: Resultsmentioning

confidence: 99%

Activity coefficients of alkyl acetates in concentrated electrolyte solutions

Cross¹,

McTigue²

1976

J. Phys. Chem.

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“…We also used the former results listed in the papers of Allam and Lee [12,13], who also employed the acoustic Pasynski method at 25 • C. The reason was the large number of simple electrolytes collected, resulting in reliable calculations Table 2.…”

Section: Resultsmentioning

confidence: 98%

Hydration Numbers of Non-Electrolytes in Aqueous Solvents of Fixed pH

Burakowski

Gliński

2009

Int J Thermophys

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In the present article the applicability of the Pasynski method of determination of hydration numbers of simple organic compounds in aqueous solvents of fixed pH at 25 • C from speed-of-sound and density measurements is tested and discussed. It was shown that for solutes which do not undergo protolytic reactions with a solvent the resulting values of hydration numbers are independent on the system pH-for these solutes n h can be determined both in pure aqueous solutions and in mixtures containing ions. For solutes which undergo reactions with an acid or base, the Pasynski method yields hydration numbers which are a combination of compressibilities of substrates and products of occurring reactions.

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“…As an example : the hydration numbers of KCl in water, as well as in waterÈdioxane mixed solvents, do not exceed 611,20 and hardly depend on the experimental method and the method of calculation (for instance, the classical Pasynski method for aqueous solutions of KCl yields the hydration number n h \ The di †erences in obtained by the two acoustic 5.4). 21 n s methods originates from slightly di †erent assumptions and are a good example of the well-known fact that any comparison of solvation numbers obtained by di †erent methods may be misleading.…”

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confidence: 99%

Solvation of praseodymium and cerium chlorides in anhydrous methanol and iso-propanol from ultrasonic velocity measurements

Gliński¹,

Keller²,

Legendziewicz³

1999

New J. Chem.

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Ultrasonic velocities and densities were measured, and the isentropic compressibility coefficients and solvation numbers for and (anhydrous and hydrated) solutions in methanol and iso-propanol at 25 ¡C were CeCl 3 PrCl 3 calculated. The results were interpreted in terms of inner-sphere coordination of chloride anions by lanthanide cations, as well as changing dissociation degree of the solutes with concentration. The steric e †ect of the solvent molecules on modelling the structure and coordination number of metal ions was considered and compared with the X-ray di †raction of solid solvates. The above studies were correlated with our earlier optical investigations1 and conÐrmed by conductivity measurements. For comparison, the same methods were also applied to cesium, calcium and tetraethylammonium chlorides.

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Ultrasonic studies of electrolyte solutions. Part II. Compressibilities of electrolytes

Cited by 29 publications

References 0 publications

Activity coefficients of alkyl acetates in concentrated electrolyte solutions

Activity coefficients of alkyl acetates in concentrated electrolyte solutions

Hydration Numbers of Non-Electrolytes in Aqueous Solvents of Fixed pH

Solvation of praseodymium and cerium chlorides in anhydrous methanol and iso-propanol from ultrasonic velocity measurements

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