A Manual of Inorganic Chemistry: Arranged to Facilitate the Experimental Demonstration of the Facts and Principles of the ScienceIvison, Blakeman, Taylor, 1872 - 605 páginas |
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Términos y frases comunes
acid gas alkaline aluminum ammonia ammonium anhydrous antimony antozone aqueous solution arsenic arsenious acid atomic weight bismuth boiling boron bottle bromine burning c.m. long calcium carbonic acid caustic charcoal chemical chlorhydric acid chlorine cold color colorless combination combustion composition compounds condensed contains copper cork crucible crystals decomposed delivery-tube deposited dilute dissolved distilled elements employed evolved experiment flame flask formula gases glass tube gramme grms H₂O heat hydrate hydrogen ignition-tube insoluble iodide iodine iron lead liquid melted mercury metal mineral mixed mixture molecule nitrate nitric acid nitrogen obtained odor ordinary temperature oxide oxygen ozone peroxide phosphoric acid phosphorus platinum porcelain portion potassium powder precipitate prepared produced proportion quantity reaction readily salt sesquioxide silicic acid silicon silver sodium solid soluble in water specific gravity substance sulphate sulphide sulphuric acid sulphydric take fire terchloride tersulphide tion unit-volume unites vapor volatile volume wire zinc
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Página 605 - ... sometimes bear the most sudden changes of temperature, but thick glass and glass of uneven thickness absolutely require slow heating and annealing. When the end of a tube is to be heated, as in rounding sharp edges, more care is required in consequence of the great facility with which cracks start at an edge. A tube should, therefore, always be brought first into the current of hot air beyond the actual flame of the gas- or spirit-lamp, and there thoroughly warmed, before it is introduced into...
Página 606 - ... a temporary handle may be attached to it by softening the end of the tube or rod, and pressing against the soft glass a fragment of glass tube, which will adhere strongly to the softened end. The handle may subsequently be removed by a slight blow, or by the aid of a file. If a considerable bend is to be made, so that the angle between the arms will be very small or nothing, as in. a siphon, for example, the curvature...
Página 607 - If the knob is large, it may be drawn off by sticking to it a fragment of tube, and then softening the glass above the junction. The same process may be applied to the too pointed end of the righthand half of the original tube, or to any misshapen result of an unsuccessful attempt to close a tube, or to any bit of tube which is too short to make two closed tubes. When the closed end of a tube is too thin, it may be strengthened by keeping the whole end at a red heat for two or three minutes, turning...
Página 66 - ... three, four, or five volumes of oxygen, and with no other proportions whatsoever. As for volumes, so for weights ; the proportional weight of oxygen in these oxides rises by definite leaps from the first member of the series to the last. This definite...
Página xxviii - Open dishes, which will bear heat without cracking, are necessary implements in the laboratory for conducting the evaporation of liquids. The best evaporating-dishes are those made of Berlin porcelain, glazed both inside and out, and provided with a little lip projecting beyond the rim. The dishes made of Meissen porcelain are not glazed on the outside, and are not so durable as those of Berlin manufacture ; but they are much cheaper, and with proper care last a long time. The small Berlin dishes...
Página 13 - Place a piece of charcoal — that of bark is best — in a deflagrating spoon. Kindle the charcoal by holding it in the flame of a lamp, and then introduce it into a bottle of oxygen. It will burn vividly, throwing off brilliant sparks if bark charcoal has been employed. In this experiment, as in the preceding, the products of the combustion are obviously gaseous, no solid substance being formed.
Página 211 - The phosphorus and the oxidizing agent are kneaded into a paste made of glue or gum, and the wooden match-sticks, the ends of which have previously been dipped in melted sulphur, are touched to the surface of the phosphorized paste, so that the sulphured points shall receive a coating of it. The sulphur serves merely as a kindling material which, as it were, passes along the fire from the phosphorus to the wood. By rubbing the dried, coated point of the match against a rough surface, heat enough...
Página xx - In preparing the upright cylinder for use, the portion below the contraction is not filled with pumice-stone ; it receives the drippings from the pumice-stone column. The gas to be dried enters by the lower lateral opening, and goes out at the top of the cylinder. Though especially adapted to the column of acid-soaked pumice-stone, this cylinder may very well be used with either oi the other drying agents, calcium, chloride or quicklime.
Página 487 - Heat the fragments in turn with the flame of the gas-lamp, aud observe the slightly yellowish flame which will be produced in each case ; then moisten one of the pieces of coke with a solution of chloride of calcium, the second with a solution of chloride of...
Página 107 - ... contain chlorine. 107. At the ordinary temperature chlorine is a gas of yellowishgreen color, 2-5 times as heavy as atmospheric air. Its specific gravity and atomic weight are 35-5. It is excessively irritating and suffocating, even when inhaled in exceedingly small quantities. Any attempt to breathe the undiluted gas would undoubtedly be fatal. Under a pressure of 4 atmospheres at 15° it is condensed to a yellow mobile liquid, having a sp. gr. of 1-33; this liquid has never yet been solidified....