A Manual Of Chemistry For The Use Of Medical Students PDF Download

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. 1891 edition. Excerpt: ...Permanent in dry air, but in moist becomes covered with a green crust of the carbonate. Uses.--Chiefly in alloys, although to some extent pure. "With Zn it forms brass and muntz-metal. With Sn it forms bronze, gun-metal, speculum-metal, etc. Many of these alloys contain small quantities of Pb. With P it forms phosphor-bronze and with Al, aluminium-bronze. It enters into the alloys of gold and silver coins. Compounds. Cu forms two sets of compounds, the cuprous and the cupric. The former are few and unimportant, excepting the oxide. For the construction of the two sets see under "Graphic Formulae," page 66. Cu(CaHaO, ), Cupric Acetate.--This is a salt used in medicine, called officinally Cupri Acetas. Quite soluble. CuSO4, Cupric Sulphate.--When combined with 5Aq, called blue vitrioL Quite soluble. Used considerably in medicine as a mild escharotic and emetic. Is an essential ingredient of Daniell's galvanic battery. This forms with a solution of ammonia a double salt, Cuprodiammonium Sulphate, (NH, ), Cu SO, . It is used as a test for As. Its graphic formula is Hx J/ All soluble copper salts are poisonous. The antidotes are potassium ferrocyanide, the alkalies and their carbonates, and the albumens, such as milk, white of eggs, etc. MERCURY--Hg. Sources.--Almost entirely as mercuric sulphide, cinnabar, in which a little metallic Hg is found. Preparation.--By roasting the sulphide, the 8 is oxidized to S0a and escapes while the Hg distills over. Properties.--A silver-white, lustrous metal, liquid at ordinary temperatures, volatile at all temperatures above--13 C. Solid at-38.8 C. and boils at 350 C. Its specific gravity is 13.59. Unaltered in the air at ordinary temperatures, but above 800 C. it forms mercuric oxide. Like Cd, ...