. American chemical journal . the marked influence of temperature on the con-ductivity of water had been pointed out by Pfeiffer^ Kohl-rausch, and Schaller,* yet very few of the experimentersworking in this field state that this fact was taken into account. 1 This Journal, 19, 91 (1897).2Wied. 31, Z. physik. Chem., 14, 324 (1894),* Ibid., 25, 497 (1898). Conductivity and Ionization of Electrolyte 363 Euler^ gives his reason for not applying the correction for and Heydweiller found that the increase in the con-ductivity of water with rise in temperature was more rap
. American chemical journal . the marked influence of temperature on the con-ductivity of water had been pointed out by Pfeiffer^ Kohl-rausch, and Schaller,* yet very few of the experimentersworking in this field state that this fact was taken into account. 1 This Journal, 19, 91 (1897).2Wied. 31, Z. physik. Chem., 14, 324 (1894),* Ibid., 25, 497 (1898). Conductivity and Ionization of Electrolyte 363 Euler^ gives his reason for not applying the correction for and Heydweiller found that the increase in the con-ductivity of water with rise in temperature was more rapid^athigher than at lower temperatures. Schallers results indicate alinear relation between conductivity and temperature from 25°to 99°. The latter relation has been found to hold in ourwork with numerous samples of water. A few of the resultsobtained with water investigated during the progress of thiswork are plotted in the accompanying diagram, where tem-peratures are the abscissae, and conductivities X io~^ Solutions.—The purest obtainable materials were usedin the preparation of the solutions. However, before the 364 Jones and Jacobson. salts were used they were carefully tested for impurities,and in most cases recrystallized one or more times. Exceptin a few cases, where the compounds are stable in the air,the solutions were all standardized by analysis. The organicacids, the purity of which had first been tested by determiningtheir melting points, were standardized volumetrically withan aqueous solution of potassium hydroxide, which had beenespecially prepared and purified. The solutions were thenmade up by diluting the more concentrated with water, andbringing them to the calibration temperature. Cell Constants.—For determining the cell constants, wetook ( + /i for water) as the conductivity of a N/50 solu-tion of potassium chloride at 25° as the basis of our calcula-tions. The purest obtainable potassium chloride was testedand further purified
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