Ferric Oxide Hydrosol PDF ePub eBook

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Ferric Oxide Hydrosol free pdf Excerpt from Ferric Oxide Hydrosol The history of ferric oxide hydrosol may be divided into three periods: (1) 1827 to 1855, (2) 1855 to 1909, and (3) 1909 to the present time. The reports by Berzelius, Maus, Souberain, Rose, Schon-bein, and Schorer, during the first period, showed that they regarded colloidal ferric oxide as a definite chemical compound of iron. The second period starts with the discovery of Pean de St. Gilles that when ferric acetate solution was heated on a water bath for four or five hours, the red solution became turbid by reflected, while clear to transmitted light. A trace of alkali or sulfuric acid precipitated all of it in the form of a red brown residue, insoluble in concentrated, but soluble in dilute acid. The acid precipitate when dried on a porus plate, turned dark brown. In this condition it was still readily soluble in water but it lost this property after being thoroughly dried. Scherer Kastner prepared a similar colloidal ferric oxide by plunging test tubes containing dilute solutions of ferric nitrate into boiling water, and Debray obtained a similar hydrosol upon heating dilute solutions of ferric chloride. Wiedemann showed that any solution of a ferric salt contains some colloidal oxide in it- and recently Wagner showed that a 1-400 equivalent normal solution of ferric chloride hydrolyzes completely to colloidal ferric oxide and hydrochloric acid in 40 minutes at 25 . Collodial ferric oxide was regarded by these early scientific workers as a modification of ferric hydroxide, but all the early attempts to determine the nature and composition of the substance were doomed to failure because in all cases the substance formed contained not only the products but all the reagents involved, as well. This difficulty was removed by the introduction of the process of dialysis by Thomas Graham. Thomas Graham prepared his ferric oxide "solution" by disolving freshly precipitated ferric hydroxide in a solution of ferric chloride. This solution, containing) from 4 to 5 percent of solid matter, was dialyzed through a parchment membrane for 11 days against distilled water. Analysis of it showed that the sol consisted of one equivalent of hydrochloric acid to 30.3 equivalents of ferric oxide, the hydrochloric acid being regarded as an impurity by Graham. (In this connection it is interesting to note that Berzelius prepared colloidal ferric oxide by the method that Graham used, but called it "basic ferric chloride.") About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully- any imperfections that remain are intentionally left to preserve the state of such historical works."

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Author : Alexander Frieden
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1330520068
EAN : 9781330520062
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 28 pages
Age + : 15 years
Language : English
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  • Ferric Oxide Hydrosol free pdfFerric Oxide Hydrosol

    Free Ebooks Download ePub. Excerpt from Ferric Oxide Hydrosol The history of ferric oxide hydrosol may be divided into three periods: (1) 1827 to 1855, (2) 1855 to 1909, and (3) 1909 to the present ti