Effects of CuCl₂·6H₂O and ZnCl₂·6H₂O on the viscosity of aqueous ethanol mixtures

Abstract

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^-3 at 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 BoldItalic- and BoldItalic-coefficients of Jones-Dole equation. The values of BoldItalic- and BoldItalic-coefficients are irregular and increase with a rise in temperature and also with an increase in ethanol contents for both salts. Negative values of BoldItalic-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 (BoldItalic_η) and change in entropy of activation (ΔBoldItalic*) were also evaluated which confirm the structure breaker behavior of salts in aqueous ethanol mixtures.

Keywords

viscosity / Jones-Dole equation / ionic interactions / transition metal chlorides / thermodynamic parameters

References

[1] Khan, A. R.; Uddin, F.; Mukhtar, M., J. Chem. Eng. Data2007, 52, 1548–1551

[2] Jones, G.; Dole, M., J. Am. Chem. Soc.1929, 51, 2950–2964

[3] Khan, A. R.; Uddin, F.; Saeed, R., Pak. J. Sci. Ind. Res.2003, 46, 151

[4] Khan, A. R.; Saeed, R.; Uddin, F., J. Appl. Sci. Environ. Mgt.2005, 9, 15

[5] Khan, A. R.; Saeed, R.; Uddin, F., J. Appl. Sci. Environ. Mgt.2006, 10, 67

[6] Khan, A. R.; Saeed, R.; Uddin, F., J. Appl. Sci. Environ. Mgt.2006, 10, 47

[7] Roy, M. N.; Jha, A. A., J. Chem. Eng. Data2001, 46, 1247

[8] Al-Kanadary, J. A.; Al-Jimaz, A.S.; Abdul-Latif, A.H., J. Chem. Eng. Data2006, 51, 2074

[9] Saeed, R.; Uddin, F.; Fazal, A., J. Chem. Eng. Data2002, 47, 1359–1362

[10] Afzal, M.; Saleem, M.; Mehmood, M. T., J. Chem. Eng. Data1989, 34, 339–346

[11] Ganapathy, K.; Ramanuja, R., J. Ind. Chem. Soc.1980, LVII, 613

[12] Donald, H.; Jenkins, B.; Marcus, Y., J. Chem. Rev.1995, 95, 2695–2724

[13] Saeed, R.; Uddin, F.; Masood, S.; Asif, N., J. Mol. Liq.2009, 146, 112–115

[14] Glasstone, S.; Laidler, K. J.; Eyring, H.The Theory of Rate Process. McGraw Hill. Co., New York 1941, 480

[15] Qadeer, R.; Khalid, N., J. Chem. Soc. Pak.2005, 27, 462

[16] Lonesh, S. K.; Jamwal, P.; Kumar, R.J. Indian. Chem. Soc.2006, 83, 156

[17] Saeed, R.; Masood, S.; Uddin, F., J. Phys. Chem. Liqs.2008, 46, 9–17

[18] El-Dossoki, F. I., J. Mol. Liq.2010, 151, 1–8

[19] Kumar, B. R.; Krishna, P. M.; Banu, S. A.; Jyothi, K. A.; Jyostna, T. S.; Satyanarayana, N., J. Phys. Chem. Liqs.2010, 48, 79–88

[20] Saeed, R.; Masood, S.; Ashfaq, M.; Irfan, A., J. Chem. Eng. Data2009, 54, 3125–3129

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