Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Similars in SciELO
Share
Portugaliae Electrochimica Acta
Print version ISSN 0872-1904
Port. Electrochim. Acta vol.24 no.2 Coimbra 2006
Activity coefficients of potassium chloride in aqueous solutions of
potassium chloride and potassium phthalate
A. Marques,* M.I.A. Ferra, M.H. Bandeira
Dep. Química, Univ. Beira-Interior, 6201-001 Covilhã, Portugal
Abstract
Mean activity coefficients of potassium chloride were determined in aqueous solutions of potassium chloride and potassium phthalate, in the temperature range 10-50 ºC and ionic strength range 0.05-4 mol kg-1, from potentiometric measurements on a galvanic cell without liquid junction. By processing the results using the Pitzer model, interaction parameters for potassium phthalate were calculated as well as their temperature dependence.
Keywords: activity coefficients, potassium phthalate, Pitzer equations.
Texto disponível em PDF
Full text only in PDF format
References
1. R.P. Buck, S. Rondinini, A.K. Covington, F.G.K. Baucke, C.M.A. Brett, M.F. Camões, M.J.T. Milton, T. Mussini, R. Naumann, K.W. Pratt, P. Spitzer, G.S. Wilson, Pure Appl. Chem. 74, 11 (2002) 2169-2200. [ Links ]
2. R.G. Bates, E.A. Guggenheim, Pure Appl. Chem. 1 (1960) 163.
3. K.S. Pitzer, J. Phys. Chem. 77 (1973) 268.
4. A.K. Covington, M.I.A. Ferra, J. Sol. Chem. 23 (1994) 1.
5. K.S. Pitzer, Ion Interaction Approach: Theory and Data Correlation, in Activity Coefficients in Electrolyte Solutions, 2nd ed., K.S. Pitzer, Ed., CRC Press, Boca Raton, Florida, U. S. A. 1991.
6. R.G. Bates, Determination of pH. Theory and Pratctice, 2nd ed., John Wiley & Sons, Inc., New York, U. S. A., 1973.
7. R.A. Robinson, R.H. Stokes, Electrolyte Solutions, 2.nd. ed., (revised), Butterworth & Co, London, 1970.
8. C.Y. Chan, Y.W. Eng, K.S. Eu, J. Chem. Eng. Data 40 (1995) 685.
9. J.I. Partanen, P.O. Minkkinen, J. Chem. Eng. Data 42 (1997) 805.
10. W.J. Hamer, G.D. Pinching, S.F. Acree, J. Res. Natl. Bur. Stand. 35 (1945) 539.
11. W.J. Hamer, S.F. Acree, J. Res. Natl. Bur. Stand. 35 (1945) 381.
12. A.J.G. Mendonça, P.M. Juusola, Fluid Phase Equilibria 231 (2005) 114.
*Corresponding author. E-mail address: ammmba@ubi.pt