Physical Review Volume 4

Physical Review Volume 4

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ... Loomis, Physical Review, IV., 1896, p. 252. The sodium silicate, Na2Si08, was Trommsdorff's c.p. salt and was not recrystallized. It yielded a perfectly clear solution without filtering. It was reduced to normal solution by using Kohlrausch's values of specific gravity.1 The graphic representation of these results is found in Fig. 1. It is to be observed that the molecular depression for KOH, NaOH, and HNO3, as exhibited in column (3), varies very little with the concentration, as has been found also to be the case with HC1. It is to be noted that the values for m = 0.01 in each instance are evidently too low and indicate experimental errors which reach, at least in the case of nitric acid, o.ooo6. The value for NaOH, m = 0.01, I am unable to explain. The measurements were twice repeated, making in all thirteen entirely distinct observations on this solution. The average of all was o.0325. The value here given, o.0328, belongs to the same series to which the other measurements belong, and for this reason was taken. The error, I think, cannot be referred to possible errors of observation. It seems to be connected in some way with the solution. It is also difficult to believe that the conversion of the NaOH and KOH into the carbonates by the C02 of the air would be sufficient to account for the marked irregularity and for the seemingly low values throughout this region of greater dilution. The present method permits no experimental answer to this question. Sodium Silicate.--The molecular depressions are very great, and the rate of decrease with increase in concentration, as in the case of SnCl4, is enormous. Thus, while it is 6.46 at m = 0.0105, it has fallen to 3.99 at m = 0.523. It is not without interest to note that the complete more

Product details

  • Paperback | 150 pages
  • 189 x 246 x 8mm | 281g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236550501
  • 9781236550507