Conductance of tetraalkyl ammonium halides in ethanol-water mixtures

Nepal Journal of Science and Technology

Shah

Yadav

2013

The accurate measurement of the specific conductivity of cetylpyridinium chloride in pure water and ethanol-water mixed solvent media containing 0.10, 0.20, 0.30 and 0.40 volume fraction of ethanol at room temperature are reported.The concentrations were varied from ~ 0.005 mol l -1 to ~ 0.0002 mol l -1.The conductivity of cetylpyridinium chloride decreases with the increase in the volume fraction of ethanol. The critical micelle concentration of cetylpyridinium chloride increases with the increase in the volume fraction of ethanol.

Section: Methodsmentioning

confidence: 99%

Effect of Solvent Composition on the Critical Micelle Concentration of Cetylpyridinium Chloride in Ethanol-Water Mixed Solvent Media

Nepal Journal of Science and Technology

Shah

Yadav

2013

“…The water used in preparation of binary solvent was obtained by triply distillation of ordinary water using potassium permanganate and sodium hydroxide. The purified water has a specific conductance less than 10 -6 S.cm -1 at 303.15 K. The dielectric constant of the binary solvent of ethanol-water mixtures at the experimental temperatures were obtained by regressing the relative permittivity data as a function of solvent composition from the literature [3].…”

Section: Methodsmentioning

confidence: 99%

“…6H 2 O is moderately soluble even in the absolute ethanol. In recent, several studies have reported that the nature of the spherical ions, having a large variation in size in aqueous mixtures of the alcohols, has received considerable attention [3]. It was reported in the previous work [4] that potassium halides are structured breakers in ethanol-water mixtures and the maximum in breaking power occurs at 0.1 mole fraction of ethanol.…”

Section: Introductionmentioning

confidence: 99%

Conductometric study of nickel chloride in ethanol-water mixed solvent media at various temperatures

Basnet

2014

BIBECHANA

The conductivity measurement of nickel chloride has been done in binary solvent of the ethanol-water system. The different percentage of ethanol including 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 (v/v) has been chosen as binary solvents. The concentration of the electrolyte in the prepared solutions varies from 0.008 to 0.1 mol.l-1 for temperatures 298.15 K, 303.15 K and 308.15 K. The conductivity of the electrolyte decreases with increase in ethanol content in the solvent at a particular temperature, which is due to the decrease in dielectric constant of the medium. The conductivity increases with increase in temperature and concentration, due to increase in mobility of ions and number of ions from observed electrolyte respectively. DOI: http://dx.doi.org/10.3126/bibechana.v12i0.11789BIBECHANA 12 (2015) 128-134

“…Distilled water with a specific conductance less than 10 -6 S.cm -1 at 303.15 K was used for the preparation of the mixed solvents. The physical properties of ethanol-water mixed solvents used in this study at 303.15K were taken from the published works [3,6,7,10].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Although numerous conductance measurements have been reported in the literature, such studies in mixed solvents are relatively rare [2]. In recent, several studies have reported that the nature of the spherical ions, having a large variation in size in aqueous mixtures of the alcohols, has received considerable attention [3]. …”

mentioning

confidence: 99%

Effects of concentration and solvent composition on the electrical conductivity of sodium bromide in pure water and ethanol-water mixed solvent media

Kathmandu University J of Sci, Engineering & Technol

Neupane

2013

Precise measurements on the conductivity of Sodium Bromide in pure water and ethanol-water mixed solvent media containing 0.10, 0.20, 0.30, 0.40, 0.50 and 0.60 volume fractions of ethanol at room temperature are reported. The concentrations were varied from ~ 0.010 to ~ 0.10 mol.L -1 . The results showed a sharp increase in the conductivity with increasing electrolyte concentration. The conductivity of electrolyte decreases with increase in the amount of ethanol.Keywords: mixed solvent media, conductivity, sodium bromide, ethanol INTRODUCTIONThe conductivity measurements provide important information on ion-ion and ion-solvent interactions [1]. Studies on electrolytic conductance in mixed solvents can provide useful information and sensitive indications of ion-solvent and ion-ion interactions and solvent structure. The effect of ion association on the conductance behavior of electrolytes has been a subject of extensive investigation. Although numerous conductance measurements have been reported in the literature, such studies in mixed solvents are relatively rare [2]. In recent, several studies have reported that the nature of the spherical ions, having a large variation in size in aqueous mixtures of the alcohols, has received considerable attention [3].