Dr. P.C. Mohanty

Journal of Molecular Liquids Cover Image

Volume 171, July 2012, Pages 50–53

Effect of concentration on thermo acoustic and nonlinearity parameters (B/A) of barium chloride solutions in glycol–water mixtures at 303.15 K

(DRIEMS) Cuttack, 754022, Odisha, India

  • b Department of Chemistry, Institute of Technical Education and Research (ITER), Sikhya ‘O’ Anusandhan University,

Bhubaneswar, 751030, Odisha, India

  • c Department of Chemistry, Kendriya Vidyalaya,Charabatia, Odisha, India

Abstract

Ultrasonic speed (U) and density (ρ) values for BaCl2.solutions are presented in 10%, 20%, and 30% glycol + water mixtures at 303.15 K. The thermo acoustic parameters like isentropic compressibility (βs), isothermal compressibility (βT) and coefficient of thermal expansion (α) have been calculated for different solutions. The experimental values of sound speed have been fitted on Ballou's and Hartmann's equation for nonlinearity parameters and the variation of these parameters with the concentrations of solute in different solutions has been discussed in the context of ion–solvent interactions.

Highlights

► Binary mixtures of barium chloride in methanol–water, ethanol-water, dioxane-water and glycol–water have been studied. ► Density and ultrasonic velocity have been measured at constant temperatures. ► Thermo acoustic parameter and nonlinearity parameters are calculated. ► The results are discussed in terms of ion–ion and ion–solvent interaction.

Keywords

  • Ultrasonic speed;
  • BaCl2 solutions;
  • Isentropic compressibility;
  • Coefficient of thermal expansion;
  • Heat capacity ratio;
  • Nonlinearity parameter

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Ultrasonic Studies on Molecular Interaction and Physico-Chemical studies of CdSO4 in Aqueous Glycerol as solvent at 303.15K

B.K.Mahanta1, Dr P.C.Mohanty2 and Dr.A.N.Pattnaik3.

1. Department of Physics, B.B.college,Baiganbadia,Baripada, Odisha,India.

2. Department of Chemistry, Kendriya Vidyalaya, Charbatia, Cuttack,Odisha,India.

3. Department of Physics, Orissa University of Agriculture & Technology, Bhubaneswar, Odisha, India.

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ABSTRACT

Various acoustic parameters like isentropic compressibility (bs),intermolecular free length (Lf),apparent molar volume (f),apparent molar compressibility (fk), molar compressibility (w),molar sound velocity (R),acoustic impedance (z) of CdSO4 in 10%,20%,30% and Glycerol+water at 303.15 K have been determined from ultrasonic velocity (V),density(r) and relative viscosity (hr) of the solution. These parameters are related with the molar concentration of the solution and reflects the distortion of the structure of the solvent (i.e ,Glycerol + water) when the solute is added to it.

INTRODUCTION:

Ultrsonic Velocity measurements are helpful to study the ion-solvent interactions in aqueous and non-aqueous solutions. Ultrasound has been extensively used to determine the ion solvent interactions in aqueous solution containing electrolytes. In solution of ionic solute the attraction between the solute and solvent is essentially of ion –dipole interaction depends mainly on ion size and polarity of the solvent. The strength of ion-dipole attraction is directly proportional to the size of the ion, charge and magnitude of the dipole, but inversely proportional to the distance between the ion and the dipolar molecule. The dissolution of electrolyte in a solvent causes a volume contraction due to interaction between ions and solvent molecules and this may influence other acoustical properties of solution. In recent years, the studies of acoustical properties of aqueous mixed electrolytic solutions have been found to be useful in understanding the specific ion-ion and ion-solvent interactions in solutions. The accurate measurement of density, viscosity, apparent molar volume, Ultrasonic velocity and hence the derived parameters such as molar compressibility, apparent molar compressibility will give significant information regarding the cstate of affairs in a solution. The interaction helps in better understanding of the types of solute and solvent i,e whether the added solute modifies or distorts the structure of the solvent. Partial molar volumes of electrolytes provide valuable information about the ion-ion and ion-solvent interactions in ionic solutions.The addition of organic solvent to an aqueous solution of electrolyte brings about the change in ion solvation that often results in a large change in the reactivity of dissolved electrolyte. The use of Glycerol + water mixtures (10%, 20% &30%) has attracted much attention in recent years as solvent in the study of physico-chemical properties of electrolytic solutions. The present work reflects the ion-ion, ion-solvent and solvent-solvent interaction of CdSO4 solution in 10%,20%, and 30% Glycerol + water mixture.

EXPERIMENTAL

All the chemicals used in this present research work are spectroscopic reagent (SR) and analytical reagent (AR) grades of minimum assay of 99.9% obtained from E-merck, Germany and Sd Fine Chemicals, India, which are used as such without further purification. Water used in these experiments was deionized and distilled prior to making solutions. Required amount of water and Glycerol were taken to prepare the composition of binary mixtures (10%, 20% & 30%) in a clean dry conical flask with a ground stopper. The required quantity of Cadmium Sulphate for a given molarity was dissolved in binary mixture of aqueous Glycerol and similar procedure has been adopted for different molarities. For each concentration, the mass of Calcium Nitrate can be measured using electronic digital balance having an accuracy ±0.1 mg.(Model:SHIMADZU AX200). The density was determined using a specific gravity bottle by relative measurement methodwith an accuracy of ±0.01 kg m-3. An Ostwald’s Viscometer (10ml Capacity) was used for the Viscosity measurement and efflux time was determined using a digital Chronometer to within ±0.01s. An ultrasonic interferometer having the frequency 5MHz (MITTAL ENTERPRISES,NEW DELHI,MODEL F-81) with an overall accuracy of ±0.1% has been used for ultrasonic velocity measurement. An electronically digital operated constant temperature bath (RAAGA INDUSTRIES) has been used to circulate water through the double walled measuring cell made of steel containing the experimental solution at the desired temperature. The accuracy in the temperature measurement is ±0.1K.

Note: To be published in Journal of Ultra chemical Science, Bhopal shortly.

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Mr. G. Gagaria PGT (Economics) Attended a three month program at Nagpur and Become NCC officer.

Mr. S.R. Dash PGT (Mathematics) Joined KV ARC Charbatia after his Deputation in Joint Indo Mangolian Senior Secondary School, Ullanbatra Mangolia

Mr.R.K. Bakolia PGT(Computer Sc.) Got permission and admitted into a two year B.Ed. program of IGNOU.

Last Updated (Wednesday, 16 January 2013 10:54)