Thermodynamic study of (sodium bromide + monosodium aspartate + water) system based on potentiometric measurements at T = (298.2 and 310.2) K
作者： Bahram Ghalami-Choobar , Fatemeh Pourhaji-Mohammadi , Parya Mossayyebzadeh-Shalkoohi
DOI: 10.1016/J.FLUID.2017.04.016
关键词: EMF measurement 、 Chemistry 、 Activity coefficient 、 Potentiometric titration 、 Analytical chemistry 、 Molality 、 Sodium bromide 、 Gibbs free energy 、 Aqueous solution 、 Electromotive force 、 Inorganic chemistry
摘要: Abstract In this study, the results relating to thermodynamic properties of (NaBr + monosodium aspartate + water) system were studied using potentiometric method at T = (298.2 and 310.2)K P = 0.1 MP. The electromotive force (emf) measurements performed on galvanic cell type: Br-ISE |NaBr (m 1 ), monosodium aspartate 2 H O |Na-ISE, over total ionic strengths from 0.01 3.0073 mol.kg −1 for different series salt molal ratios r (r = m NaBr /m NaAsp = 1.0,2.5, 5.0,7.5,10.0) single in aqueous 310.2)K. mean activity coefficients NaBr + monosodium aspartate + water determined emf based Nernst equation by a containing solvent polymeric (PVC) Na + Br − ion selective electrodes which prepared our laboratory. study ternary was made Pitzer interaction model Harned rule. resulting values coefficients, osmotic excess Gibbs free energy together with mixing parameters ( θ BrAsp and ψ NaBrAsp ) under investigated reported.
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