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- W2009558806 abstract "Measurements of the B coefficients of viscosity in the Jones–Dole equation ηr= 1 +Ac½+Bc are reported for the alkali-metal chlorides in the propan-1-ol–water system at 25 and 35 °C; they extend to 85%(w/w) propanol for Cs+Cl– to 70%(w/w) propanol for Na+Cl– and K+Cl– and 30%(w/w) propanol for Li+Cl–. Photoelectric timing and high-precision density measurements were used in determining the relative viscosities, ηr, of the solutions. Conductivity measurements of intermediate precision gave values of the limiting equivalent conductivities of the electrolytes for use in the calculation of A, above. To 50% alcohol, the equivalent conductances of the ions could be established accurately using transport numbers from another investigation. To 30% alcohol the Jones–Dole equation was obeyed by all the electrolytes except Li+Cl–, where an additional term Dc2, with small positive values of D, was required. For mixtures containing 50%(w/w) alcohol or more, the Jones–Dole equation was of the correct form to represent the ηr, but the values of A required were larger than the theoretical ones; the conductivity measurements indicated that the electrolytes were associated in these mixtures. The values of the ion-pair dissociation constants, determined from the conductivity measurements, were about those expected from Bjerrum theory; they were used to calculate the degree of dissociation α of the ion pairs. Values of Bi, referring to the free ions, were obtained by fitting the ηr to the equation ηr= 1 +A(αc)½+Biαc+Bp(1 –α)c in which Bp is the corresponding coefficient for the ion pairs. Values of the partial molal volumes of the electrolytes at infinite dilution in the various solvent mixtures were obtained from the density measurements. The densities and viscosities of the mixtures are recorded." @default.
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- W2009558806 date "1986-01-01" @default.
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- W2009558806 title "The viscosity and structure of solutions. Part 2.—Measurement of the B coefficient of viscosity for alkali-metal chlorides in propan-1-ol–water mixtures at 25 and 35 °C" @default.
- W2009558806 doi "https://doi.org/10.1039/f19868202195" @default.
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