. Carnegie Institution of Washington publication. OF SALTS IN ETHYL ALCOHOL AND WATER. 93 The third conclusion may be disposed of first as of little value, since it will be remembered that salts of the alkali metals are very little hydrated or alcoholated. We have just seen, from a study of the viscosity data, that there is a marked negative viscosity, i. e., positive fluidity, at the water end of the fluidity curves. On the other hand, there is a steadily increasing viscosity at the alcohol end. Moreover, the transition-point from positive to negative viscosity was shown to be nearer the pure
. Carnegie Institution of Washington publication. OF SALTS IN ETHYL ALCOHOL AND WATER. 93 The third conclusion may be disposed of first as of little value, since it will be remembered that salts of the alkali metals are very little hydrated or alcoholated. We have just seen, from a study of the viscosity data, that there is a marked negative viscosity, i. e., positive fluidity, at the water end of the fluidity curves. On the other hand, there is a steadily increasing viscosity at the alcohol end. Moreover, the transition-point from positive to negative viscosity was shown to be nearer the pure water than the pure alcohol. To recapitulate, it was concluded from these. lo 0 0 10 20 30 40 50 60 70 80 90 100 Percentage alcohol FIG. 41.—N/128 Nal. 0 10 20 30 40 50 60 70 80 90 100 Percentage alcohol FIG. 42.—N/32 Nal. results that the change in association brought about by the mixing of the two solvents appeared to take place more largely in the case of the water than of the alcohol. Both our first and second conclusions, with regard to the phenomenon observed in the case of conductivity, appear, then, to be in perfect harmony with those concerning the association and the viscosity. As to the final conclusion, it obviously follows as a matter of course from what has preceded, since the association and viscosity are so closely related. The decrease in the conductivity as a whole is more rapid for the potassium iodide than for the sodium iodide. This is what might have been expected from a study of the viscosity data, which, in turn, are affected by the relative ionic volumes of potassium and sodium. The former, having the larger volume, would have a greater negative effect. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washing
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