The Volume Change on Ion-Pairing of Symmetrical Electrolytes*
نویسنده
چکیده
The increase in the standard partial molar volume of a symmetrical electrolyte on ion-pairing, A V, calculated from the experimental association constant at ambient pressure, the isothermal compressibility, the dielectric constant of the solvent and its pressure coefficient, is as good a measure of this quantity as values calculated from more elaborate experimental procedures, such as the pressure coefficient of the association constant or high precision density determinations in dilute solutions.
منابع مشابه
Thermodynamic study of Ion pairing in Aqueous solution of 〖BaF〗_2 by (_^19)F-NMR
The ion-pair association constant values, related to the reaction + were determined by means of the NMR spectroscopy. The values of the thermodynamic functions of the ion pairing process were calculated on the basis of the NMR results. In addition, the association entropy was found to be dependent on the temperature. Comparing the experimental data and the Fuoss theory it is found that ion-pa...
متن کاملThermodynamics of Ion Association in the Saturated Solution of The Mixed Solvent (methanol+water) and Ion Pairing at 25.0°C
In this study, the ion association phenomenon in the saturated solution of KCl in the mixed solvent(methanol+water) was studied. The solubility of this compound in the mixed solvent (methanol+water by value percent of methanol = 60%), and in the presence of various molarities of NaNO3 wasdetermined by the solvent evaporation method at 25.0°C. The results enable us to estimate the valueof thermo...
متن کاملNon- Ideality and Ion-Pairing in Saturated Aqueous Solution of Lithium Carbonate at 25°C
Using Solvent Evaporating and Atomic Emission Spectrophotometric methods, the solubility of Li2CO3 in waterat 25°C was determined. Comparing the value of thermodynamic solubility product constant, Ksp(th),(Ksp(tn) = exp(—AG.ss/RT)) of the mentioned salt to the value which is obtained from the observed solubility,shnolL-1 , and activity coefficients, f+ and f, which are estimated upon the extend...
متن کاملIon Pair Dispersive Liquid-Liquid Microextraction for the Determination of Trace Amounts of Copper(II) in Soil, Multivitamin Tablet, Tea and Water Samples Using Flame Atomic Absorption Spectrometry
Ion pair dispersive liquid- liquid microextraction (IP-DLLME) method combined with flame atomic absorption spectrometry was proposed for the determination of trace amounts of copper(II). By using pyrocatechol violet as chelating agent and cetyltrimethyl ammonium bromide as an ion pairing agent, the trace amount of copper(II) was extracted in chloroform. The factors influencing the formation cop...
متن کاملEffects of Methanolic Extract of Oxystelma esculentum on Diuresis and Urinary Electrolytes Excretion in Rats
The diuretic activity of methanol extract of Oxystelma esculentum aerial parts (MEOE) was studied in male Wister albino rats at 5h and 24h interval. The animals were divided into 5 groups: control, urea, furosemide and 200mg/kg and 400mg/kg MEOE. The extract was administered intraperitoneally (i.p) pretreated and all animals were saline MEOE. The urine volume (in mL) and electrolytes excretio...
متن کامل