Licence: Public Domain Mark
Credit: Qualitative chemical analysis / by C. Remigius Fresenius. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![^ -j OXIDE OF LEAD. ^^^'^ • 'A ;r,+n mfircuric chloride, and metalUc mercury by hydrochlonc ^'3'e^^^^^ it into mercuric chloride which separates; ^l^^l^*/^'^f/''^itXdrochloric acid and chlorine .ndnitrate of mercun^^^^^^^^^^^ chS readily, converting it into water dissolve tne meiouiuu __i.„c.ca decompose mercurous xnercuric chloride. ^^^^^^^^^^STc^^^^^^ subamide of chloride, separating from it, the J rHg^NH.CI] the latter mercury with mercurous chloride, Hg^NH^Hg.t-i l 6^ 'g's'aZus cMoride produces first of aU a white precipitate of 9 If an intimate mixture of an anhydi-ous compound of mercury w^th drv cS^nate of soda is introduced into a glass tube sealed with dry f . 1 of carbonate of soda, and strongly krger globules by rubbing the sublimate with a glass rod. § 117. c. Oxide of Lead, PbO [PbO]. 1 Metallic lead is bluish-gray; its surface recently cu* exhibits a me a lie lustre; it is soft, maUeable, readUy fusible, and volatile at a tSte heat. loused upon charcoal before the blowpipe it forms a coat- ^g of yellow oxide on the support. Hydrochloric acid and moderately SLentrated sulphuric acid act on it but little, even with the aid of S; dilute nitric acid, however, dissolves it readily, more particularly °''^2''oSde of lead is a yellow or reddish-yellow powder, which appears brownish-red whilst hot; it is fusible at a red heat. Hy^^^ed oxide of lead is white. Both the oxide and its hydrate dissolve readily in nitric and acetic acids. The peroxide of lead I'bO [PbOJ ib brown, and on ignition is converted into the oxide. It is not dissolved by heating with nitric acid alone, but dissolves readily if some sugar or spirit of wine is added. The solution contains nitrate of oxide of lead. Minium, 2PbO,Pb03 [Pb30J, which is red, may be regarded as a com- pound of lead oxide with peroxide of lead. When treated with nitric acid, oxide of lead is dissolved and lead peroxide is left. 3 The salts of oxide of lead are not volatile, and mostly colourless • the neutral soluble salts redden litmus-paper, and are decom- posed at a red heat. Only a few of the insoluble lead salts—carbonate of oxide of lead, for example—are decomposed by ignition. If chloride](https://iiif.wellcomecollection.org/image/b21966953_0165.jp2/full/800%2C/0/default.jpg)
