. Carnegie Institution of Washington publication. 48 WORK OF C. M. STINE. Table 35—Continued. Hydrates. m M Sp. gr. cor. Mr. Hc A1C1,. . Fed,. . A1C1,.. .. AlCU. • .. Fed,... Feds. Aids. 24. 4 29 0 -o v c IS E o U It is to be noted that the conductivi
. Carnegie Institution of Washington publication. 48 WORK OF C. M. STINE. Table 35—Continued. Hydrates. m M Sp. gr. cor. Mr. Hc A1C1,. . Fed,. . A1C1,.. .. AlCU. • .. Fed,... Feds. Aids. 24. 4 29 0 -o v c IS E o U It is to be noted that the conductivity measurements which are given in table 35 are the merest approximations to measurements of dissociation. The conduc- tivity measurements are made at zero, whereas some of these mixtures freeze very considerably below 0°C. There is marked hydrolysis in some cases, as already mentioned, leading to a pre- 40 cipitation of the iron. There is con- siderable difference between the viscos- ity of the single solutions and of the mixtures where the normalities are the same. The assumption that these salts dissociate at once, in the most con- +++— — — centrated solutions, into M, CI, CI, CI, is certainly not correct. Finally, the values of /i«> are obtained by calcula- tion, and may differ considerably from the true values because of the factors just mentioned. The values of M and of Me are plotted as curves in fig. 16. The gen- eral relation shown by these curves are the same as have previously been pointed out. The fact that the hy- drating power of both the aluminium chloride and the ferric chloride is appar- ently greater in the mixture than in the separate solutions, in the most dilute solutions employed, is probably due to the effect of hydrolysis in increasing the value of L, and consequently diminishing M, though it may possibly be due, in part, to change in dissociation and difference in the hydrating power of the ions and molecules. It -I 20 S s £ 2 B •2 10.
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