Elements of Chemistry, in the Order of the Lectures Given in Yale College Volume 2 - Softcover

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1831 edition. Excerpt: ...Sp. gr. 10.97 to l1.48--of thefused button 11.87; its true gravity robably falls little short of 12. (c.)-nfusible by the common blowpipe, or in an open vessel when heated above the point of melted gold, but with an intense heat it melt: and the button is grayish white. (d.) Among metals, an imperfect conductor of heat; conducts plpoutfas well as_lplp)tin21;n; ifdthue poyverl of gt: latteg is called 1, at 0 co er WI e, an at 0 SI ver _; rat er more ewpamible blypheat than platinum. (e.) Melts, scintillates and appears to burn, under the compound blow pe. (fl); It cannot be doubted that its wire or leaf would be dissipated with the usual phenomena, by the electric or galvanic discharge, but I do not know that it has been attempted. " Vauquelin's method of obtaining palla.dium.--Place in the nitro-muriatic solution, (containing an excess of acid, ) slips of bri ht iron; all the metals are precipitated, except iron itself; nitric and muriatic aci s, successively applied, dissolve the iron. copper and lead; the residue is heated in a crucible, to remove the muriates of mercury, copper and osmium, and then it is treated by nitro-muriatic acid, which dissolves all the metals except iridium; the solution contains the muriates of platinum, palladium, rhodium, iron and copper; it is decomposed by muriate of ammonia, filtered and evaporated to dryness, to separate the muriate of ammonia and piltinum; the residue is dissolved in water, acidulated by muriatic acid, and decomposed by ammonia, not quite suiiicient to saturate the acid; a sub-muriate or chloride of ammonia and palladium precipitates immediately, in delicate silky needles of a rose color, which are washed with water, acidulated by muriatic acid; it is decomposed by heat, ...