Densities and Viscosities of Citric Acid in Aqueous Cetrimonium Bromide Solutions with Reference to the Manifestation of Solvation

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• 作者：Mahendra Nath Roy ; Riju Chanda ; Rajesh Kumar Das ; Deepak Ekka
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2011
• 出版时间：August 11, 2011
• 年：2011
• 卷：56
• 期：8
• 页码：3285-3290
• 全文大小：758K
• 年卷期：v.56,no.8(August 11, 2011)
• ISSN：1520-5134

文摘

Apparent molar volumes (V) and viscosity B-coefficients for citric acid in (0.001, 0.003, and 0.005) mol路dm^鈥? aqueous cetrimonium bromide (N-cetyl-N,N,N-trimethyl ammonium bromide, C₁₉H₄₂NBr) solutions have been determined from solution density and viscosity measurements at T = (298.15, 308.15, and 318.15) K and p = 0.1 MPa as a function of the concentration of citric acid. The apparent molar volumes have been extrapolated to zero concentration to obtain the limiting values at infinite dilution (V⁰), using the Redlich鈥揗eyer equation, and the obtained parameters have been interpreted in terms of solute鈥搒olvent interactions. The viscosity data were analyzed using the Jones鈥揇ole equation, and the derived parameters A and B have also been interpreted in terms of solute鈥搒olute and solute鈥搒olvent interactions, respectively, in the mixed solutions. The structure-making or -breaking ability of the electrolyte has been discussed in terms of sign of dB/dT. The activation parameters of viscous flow for the ternary solutions studied have also been calculated and explained by the application of transition state theory.