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Mean distance of closest approach of ions: Sodium salts in aqueous solutions
Ribeiro, Ana C. F.; Esteso, Miguel A.; Lobo, Victor M. M.; Burrows, Hugh D.; Amado, Ana M.; Costa, António M. Amorim da; Sobral, Abílio J. F. N.The estimation of numerical values for the mean distance of closest approach of ions, a, of sodium salts in aqueous solutions, determined from activity and diffusion coefficients, and also from different theoretical approaches, is presented and discussed. ; http://www.sciencedirect.com/science/article/B6TGR-4JCCFW7-1/1/45bf32523013b068b5040514add5505a
Diffusion Coefficients of Chromium Chloride in Aqueous Solutions at 298.15 K an...
Ribeiro, Ana C. F.; Lobo, Victor M. M.; Oliveira, Liliana R. C.; Burrows, Hugh D.; Azevedo, Eduarda F. G.; Fangaia, Sónia I. G.; Nicolau, Pedro M. G.Mutual diffusion coefficients (interdiffusion coefficients) have been measured of chromium(III) chloride in water at 298.15 K and 303.15 K at concentrations between 0.005 mol·dm-3 and 0.05 mol·dm-3 using a conductometric cell. The experimental mutual diffusion coefficients are discussed on the basis of the Onsager−Fuoss model. The equivalent conductance at an infinitesimal concentration of the chromium(III) ion...
Interactions of vanadates with carbohydrates in aqueous solutions
Ribeiro, Ana C. F.; Valente, Artur J. M.; Lobo, Victor M. M.; Azevedo, Eduarda F. G.; Amado, Ana M.; Costa, A. M. Amorim da; Ramos, M. LuísaThe interaction between the vanadate ion (VO3-, i.e. vanadium (V)) and the carbohydrates sucrose, glucose and fructose has been studied in aqueous solutions (pH [approximate]6, 298.15 K) using measurements of diffusion coefficients, electrical conductivity, Raman and multinuclear NMR spectroscopy. With sucrose and glucose, indications of hydrolysis of the anion in the absence of the sugars came from a decrease ...
Diffusion coefficients of sodium dodecylsulfate in aqueous solutions of sucrose...
Ribeiro, Ana C. F.; Lobo, Victor M. M.; Azevedo, Eduarda F. G.; Miguel, M. da G.; Burrows, H. D.Differential diffusion coefficients of sodium dodecylsulfate (SDS) in aqueous solutions of sucrose and in aqueous solutions at 298.15 K, over the concentration range 0.0018 M to 0.0817 M, have been measured using a conductimetric cell and an automatic apparatus to follow the diffusion. The results are discussed on the basis of the Onsager-Fuoss model. The cell uses an open ended capillary method, while a conduc...
Diffusion Coefficients in Aqueous Solutions of Ammonium Monovanadate at 25°C
Ribeiro, Ana C. F.; Lobo, Victor M. M.; Azevedo, Eduarda F. G.Differential diffusion coefficients of ammonium monovanadate in water at 25°C and at concentrations from 0.001 to 0.05 mol-dm-3, have been measured using a conductimetric cell and an automatic apparatus to follow diffusion. The cell uses an open-ended capillary method and a conductimetric technique is used to follow the diffusion process by measuring the resistance of solutions inside the capillaries at recorde...
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