首页|Effects of CuCl2·6H2O and ZnCl2·6H2O on the viscosity of aqueous ethanol mixtures
Effects of CuCl2·6H2O and ZnCl2·6H2O on the viscosity of aqueous ethanol mixtures
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The effects of CuCl2 and ZnCl2 on the viscosity in aqueous ethanol mixtures (10％-50％ v/v) were studied in the concentration range 1.0 × 10-2-8.0 × 10-2 mol· dm-3at different temperatures. It was found that the viscosities increased with an increase in the concentration of the salts and percent composition of ethanol content, whereas it decreased with an increase in temperature. Ion-ion and ion-solvent interactions are determined with the help of A- and B-coefficients of Jones-Dole equation. The values of A- and B-coefficients are irregular and increase with a rise in temperature and also with an increase in ethanol contents for both salts. Negative values of B-coefficients show that ion solvent interactions is comparatively small and suggest that CuCl2 and ZnCl2 behave as structure breakers in aqueous ethanol mixtures. Thermodynamic parameters like the energy of activation (Eη) and change in entropy of activation (△S*) were also evaluated which confirm the structure breaker behavior of salts in aqueous ethanol mixtures.
viscosityJones-Dole equationionic interactionstransition metal chloridesthermodynamic parameters
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NSTL
万方数据
