A treatise on the theory of solution including the phenomena of electrolysis . o agreewell with Kohlrauschs values. 1 Wi,,L Ann. 20<) (18.)7). - Sitz. Akud. Ulss. 11,-rlin, .VM (1897). » Fhil. Trans. A. cxcn. 331 (1899). CH. IX] CONDUCTIVITY OF ELECTROLYTES 221 The following table gives the mobilities of the ions, rela-tively to the value for potassium, which is put equal to 100, asdetermined by Masson, Kohlrauschs theoretical values for one-tenth normal solutions being appended for comparison. Chlorides Sulphates Kohl-rausch n = 5 n = l n = 2 n = -5 n = l 71 = 2 n = -l K Na Li NH4 1
A treatise on the theory of solution including the phenomena of electrolysis . o agreewell with Kohlrauschs values. 1 Wi,,L Ann. 20<) (18.)7). - Sitz. Akud. Ulss. 11,-rlin, .VM (1897). » Fhil. Trans. A. cxcn. 331 (1899). CH. IX] CONDUCTIVITY OF ELECTROLYTES 221 The following table gives the mobilities of the ions, rela-tively to the value for potassium, which is put equal to 100, asdetermined by Masson, Kohlrauschs theoretical values for one-tenth normal solutions being appended for comparison. Chlorides Sulphates Kohl-rausch n = 5 n = l n = 2 n = -5 n = l 71 = 2 n = -l K Na Li NH4 10065-744-7 97-9 10065-445-2 100 96-1 10065-8 93-6 10066-947-1 40-5 87-7 10066-9 44-4 36-9 87-7 45-2 38-787-7 100624696 104 B. D. Steele 1 has extended Massons method by the dis-covery that, under certain conditions of concentration andpotential gradient, the boundary between two colourless solu-tions, owing to the difference in refractive index, is clearlyvisible. He has also freed the method from the disturbinginfluence of jellies by placing the solution to be examined in. Fig. Ph^l. Trans. A, cxcviii. 105 (1902). 222 SOLUTION AND ELECTROLYSIS [CH. IX the limbs of the glass apparatus of figure 56, and confining itbetween two partitions of jelly, containing the indicator solu-tions, aqueous solutions of which are also poured into the tubesabove the jelly walls and contain the electrodes. When thecurrent flows, the indicator ions leave the jellies, and enter theliquid columns, after which their velocities cannot be influencedby the presence of the jelly. If the indicator solutions havedensities greater than that of the other, the rubber stoppersclosing the bottom of the apparatus are removed, and the tubesshown at the sides are inserted. The indicator ions can thusbe made to enter the solution from below. Steeles results for the migration constants agree well withthe best of those obtained by the method of Hittorf, andgenerally with those obtained by the method of Masson.
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