Author : William Thomas Brande
Publisher : Forgotten Books
ISBN 13 : 9780656119097
Total Pages : 560 pages
Book Rating : 4.1/5 (19 download)
Book Synopsis A Manual of Chemistry, Vol. 2 of 2 by : William Thomas Brande
Download or read book A Manual of Chemistry, Vol. 2 of 2 written by William Thomas Brande and published by Forgotten Books. This book was released on 2018-02-08 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Manual of Chemistry, Vol. 2 of 2: Containing the Principal Facts of the Science, Arranged in the Order in Which They Are Discussed And; Illustrated in the Lectures at the Royal Institution of Great Britain When the tartrate of manganese and potassa is intensely heated in a wind-furnace it furnishes globules of metallic man ganese; and as this salt is easily Obtained in a state of purity, its decomposition is perhaps the simplest process for obtaining the pure metal, care being taken to exclude foreign substances derivable from the fuel or from the crucible. Manganese is a hard gray metal, exhaling a peculiar odour when handled or breathed upon it is brittle, and has a gra mular fracture; its specific gravity is When pure, it does not affect the magnetic needle. It is best preserved in naphtha; for in the air it soon crumbles down into a black powder, and undergoes the same Change in water, with the evolution of hydrogen gas. It may also be conveniently kept in a small glass tube hermetically sealed. Manganese and Oxygen. -there are four compounds of manganese and oxygen, three of which are oxides, and one an acid. Protoxide of Manganese is obtained by passing a current of hydrogen over the pure deutoxide or peroxide contained in a porcelain or iron tube, exposed to a heat gradually raised to bright redness: water is formed, and a dingy green powder remains in the tube, which is the protoxide. It may also be procured by mixing the peroxide with half its weight of muriate of ammonia, and projecting the mixture in successive portions into a red-hot crucible; the product is lixiviated, and the solution of chloride of manganese, thus obtained, is decomposed by the addition of carbonate of po tassa; the precipitate is collected, washed, dried, and exposed, out of the contact of air, to an intense heat; or it may be heated in a tube, through which a current of hydrogen is passed. 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.
