Abstract

Study of the Dissolution of Calcium Carbonate in Different Mixed Solvent at Different Temperatures by Conductometric Method and Data Analysis Using Thermodynamic Parameters

Ashoke Hazra^*

DOI : http://dx.doi.org/10.13005/ojc/400626

Abstract:

Present paper discussed the dissolution behavior of CaCO3 in (water + THF), (water + AN) and (water + DMF) medium at 100C to 300C by conductometric method. From the molar conductance data, we calculate limiting conductance value at infinite dilution using Karus Bray equation. From these data we calculate thermodynamic parameters like ∆H, ∆G, ∆S, ∆Es & Kc. These data helps us to compare dissolution behavior of CaCO3 in different mixed solvent at different temperatures. From this dissolution study of CaCO3 in different non aqueous systems it was observed that stronger ion interaction occur in case of THF and AN & partial dissociation or ion pairing occur in case of DMF solvent. With increase in temperature, limiting molar conductance increases for all the systems. The present work aims to determine the limiting molar conductance values of Calcium Carbonate in different mixed solvents in different temperatures and also evaluate thermodynamic parameters for supporting the ion-solvation interaction.

Keywords:

AN (Acetonitrile); Conductance; CaCO3; DMF(Dimethyl Formamide); dissolution; THF(Tetrahydro Furan)

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