Elements of Chemistry: Inorganic chemistry 1871. xxii. [2], 825pJ. Wiley, 1871 |
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Frases i termes més freqüents
absorbed action alkaline ammonia ammonium anhydrous antimony atoms of water barium becomes bisulphide of carbon boiling boron bromine bulk burns calcium carbonic anhydride carbonic oxide charcoal chloric acid chloride colour colourless combination combustion composition compound condensed contains converted cool copper crystalline crystals cyanogen decomposed decomposition density deposited diluted dissolved distilled emit evaporation excess expelled flame fluoride formed fumes fused gaseous gases glass H₂O heated hydrate hydrochloric acid hydrogen hyposulphite insoluble iodide iodine iron lead liquid magnesium manganese melts mercury metals mixed mixture nitrate nitric acid nitrogen nitrous obtained odour oil of vitriol olefiant gas oxalic oxide oxygen peroxide phosphate phosphoric acid phosphorus platinum potash potassium powder precipitate produced proportion retort salts selenic acid selenium silica silicon silver small quantity sodium soluble in water solution sulphate sulphide sulphuretted hydrogen sulphuric acid sulphurous anhydride tellurium temperature tion transparent tube vapour volatile volume weight whilst yellow zinc
Passatges populars
Pàgina 769 - Hence, the temperature of the sun may be approximatively estimated to be not higher than that of the oxyhydrogen flame. It certainly appears to be far below that of the electric spark. Magnesium in the electric spark gives a remarkably strong band just beyond the limits of the solar spectrum. Now magnesium is as clearly proved to exist in the solar atmosphere as any element, if we be admitted to have any such proof at all. But inasmuch as the special band which characterizes magnesium at a high temperature...
Pàgina 705 - ... and hydrogen. Platinum-black is a preparation of the metal in a still more minute state of subdivision, and has the property of effecting chemical changes more energetically than platinum sponge. It may bo produced by electrolyzing a dilute solution of the metal. 474. Platinic Tetrachloride, PtCl4, is obtained by dissolving platinum in aqua regia and evaporating the solution over the water-bath. It is a brownish-red substance, soluble in water and alcohol, forming a reddish-yellow solution. It...
Pàgina 682 - ... passing a stream of sulphuretted hydrogen through neutral or acid solutions of their salts, when they are precipitated in an insoluble form; and the hydrated sulphides of zinc, iron, manganese, cobalt, and nickel may be prepared, by double decomposition, by mixing a solution of the salt of the metal with a solution of a sulphide of one of the metals of the alkalies, as, for example, sulphide of potassium: thus, sulphate of zinc, if mixed with sulphide of potassium, yields sulphate of potash,...
Pàgina 305 - The sulphides of molybdenum, rhodium, iridium, and osmium are brown, each with its peculiar shade, whilst in a large number of instances —including the sulphides of iron, cobalt, nickel, uranium, vanadium, bismuth, copper, lead, silver, mercury, gold, platinum, and palladium — the precipitated sulphides are of a black, more or less pure.
Pàgina 131 - However, it may be made directly by heating iodine in an atmosphere of hydrogen ; or a solution of this acid may be " easily prepared by suspending iodine in water, and transmitting a current of sulphuretted hydrogen gas until the brown colour disappears. " Sulphur is deposited, and hydriodic acid formed, which goes into solution in the water. If this solution be exposed to the air in sunlight, it gradually absorbs oxygen, the hydrogen of the acid forming with it water, and the liberated iodine renders...
Pàgina 511 - ... by cobalt and nickel. Its susceptibility to magnetism is one of its most remarkable characteristics. See MAGNETISM. At a high temperature, it burns readily, as may be seen at the forge, or (more strikingly) when a glowing wire is introduced into a jar of oxygen, In dry air, and at ordinary temperatures, the lustrous surface of the metal remains unchanged; but in a moist atmosphere the surface rapidly becomes oxidized and covered with rust, which consists mainly of the hydrated oxide of iron....
Pàgina 740 - Now no other explanation of these phenomena can, be given, than that a body in the act of combination or decomposition enables another body, with which it is in contact, to enter into the same state. It is evident that the active state of the atoms of one body has an influence upon the atoms of a body in contact with it ; and if these atoms are capable of the same change as the former, they likewise undergo that change; and combinations and decompositions are the consequence.
Pàgina 20 - ... soluble in water; alcohol also dissolves it freely, which is the case with comparatively few of the compounds of this base; the solid hydrate of commerce, which is very impure, may thus be purified. The solution of this substance possesses, in the very highest degree, the properties termed alkaline; it restores the blue colour to litmus which has been reddened by an acid ; neutralizes completely the most powerful acids; has a...
Pàgina 34 - ... the mouth of which is kept just below the surface of the water by means of floats. Fuel gas from a coke stove is forced continuously by means of Capacity of Plant, Gallons per Hoar.
Pàgina 335 - ... each particle being thus facilitated. If tartrate of lead be heated in a tube till the organic portion becomes charred, the metallic lead is reduced to a state of extreme subdivision, and usually takes fire when poured into the air. If finely-powdered sulphate of potash be mixed with half its weight of lampblack, and heated in a covered crucible, the sulphate is reduced to sulphide of potassium, which remains in a finely-divided state, mixed with the excess of carbon, and takes fire spontaneously...