File:American journal of pharmacy (1899) (14596779419).jpg

Identifier: americanjournal711899phil (find matches)
Title: American journal of pharmacy
Year: 1835 (1830s)
Authors: Philadelphia College of Pharmacy Philadelphia College of Pharmacy and Science
Subjects: Pharmacy Pharmacology
Publisher: Philadelphia : Philadelphia College of Pharmacy
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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at 150 C. were determined by the digestionmethod. The solvent was allowed to act for several days, with fre-quent agitation, on an excess of the chemical at a temperatureslightly below 150 C. When the solvent did not appear to take upany more of the salt, the temperature was kept at 150 C. for aboutfour hours, shaken as above, then filtered and the amount of solventdetermined in a given weight of the filtrate. The solubilities in boiling water and boiling alcohol weredetermined by estimating the amount of the salt actually dissolvedat the boiling point of the saturated solution. This, of course, ismuch higher than ioo° C. for water, or about 780 C. for alcohol.The writer has seen the boiling point of such an aqueous mixturerise up to 1400 C. and above, and an alcoholic solution as high as95° C. On ignition, a residue of lithium carbonate mixed with carbon isleft. It would be more nearly correct to say that the mixture con-sists of lithium carbonate, carbon and the oxides of lithium.
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60 Lithium Benzoate and Salicylate. (A£ebv°u£y*mm I was always of the opinion that lithium benzoate was acidto litmus. Such, however, is not the case. The excess of ben-zoic acid is probably volatilized with the aqueous vapor, formedduring the process of manufacture. In the Digest of criticisms on the U.S.P., 1890, Part II, p.102, we find the following: The addition of a drop ofammonia to the ferric chloride T. S. (fifth paragraph), is neces-sitated by the slight acid reaction of the lithium)- salt. Ber-zelius prepared the basic ferric benzoate as directed by theU.S.P. The reason for adding the ammonia is not apparent. Itcannot be to neutralize the acidity of the ferric chloride solution,for, when the basic iron benzoate is formed, hydrochloric acid isliberated, which, in turn, liberates benzoic acid. The voluminous precipitate formed when a ferric chloride solu-tion is added to an aqueous solution of lithium benzoate or anyother neutral soluble benzoate, is but flesh-colored or li

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