The viscosities and densities of rubidium bromide were determined in dimethyl sulfoxide (DMSO) + H2O mixtures of different compositions as a function of concentration (0.01 to 0.06) mol·L−1 and ...temperatures (25 to 45) °C to obtain the Jones−Dole B-coefficient. The positive values indicated that the salt behaved as a structure maker in DMSO, and in DMSO + H2O mixtures, the B-coefficient values were less positive, showing a weak structure-making effect. On the other hand in H2O, B-coefficient values of RbBr were negative, showing the structure-breaking ability.
The relative viscosities and densities for lithium bromide (LiBr) and sodium bromide (NaBr) were measured in dimethylsulfoxide (DMSO), water, and DMSO + water at temperatures from (25 to 45) °C. The ...estimated uncertainty of the measurements was ± 0.003 for relative viscosities and ± 0.0004 for densities. The data have been analyzed using the Jones−Dole equation. The Jones−Dole B-coefficients of these electrolytes were derived and the estimated uncertainty was ± 0.002. The values of the B-coefficients indicated that the salts behave as structure makers in DMSO, while in H2O and DMSO + H2O mixtures, the B-coefficient values were less positive showing a weaker structure-making effect.
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