Fownes' Manual of Chemistry, Theoretical and PracticalHenry C. Lea, 1878 - 1003 หน้า |
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ฉบับอื่นๆ - ดูทั้งหมด
คำและวลีที่พบบ่อย
acetate action alcohol alkaline ammonia ammonium anhydrous aqueous arsenic atmosphere Atomic weight barium bodies bromine calcium called carbon dioxide caustic chemical chloric acid chloride cold color colorless combination composition compounds condensed containing converted cooling copper crystalline crystals cubic cyanide decomposed decomposition density dilute dissolves distilling easily electric elements ethene ether ethyl excess flame formed fused gases glass H₂O hydrate hydriodic acid hydrochloric acid hydrogen sulphide hydroxide ignition inches insoluble iodide iodine iron latter liquid magnetic melts mercury metallic mixed mixture molecules monoxide nitrate nitric acid nitrogen obtained odor oil of vitriol oxide oxygen passing phosphorus plate platinum potash potassium potassium chloride precipitate prepared pressure prisms produced proportion pure quantity radicles reaction salts separated silicate silver sodium sodium carbonate solid soluble in water solution specific gravity specific heat substance sulphate sulphuric acid temperature tion tube vapor vessel volatile volume yellow yields zinc
บทความที่เป็นที่นิยม
หน้า 28 - one at the top and the other at the bottom of the curve. The marks are easily made by a fine, sharp, triangular file, the hard point of which, also, it may be observed, answers perfectly well for writing upon glass, in the absence of a
หน้า 306 - is evolved, and escapes through a flue, with the products of combustion, into towers or scrubbers, filled with coke and bricks moistened with a stream of water ; the acid vapors are thus condensed, and the smoke and heated air pass up the chimney. After the mixture of salt and acid
หน้า 27 - and then divide the weight of the liquid by the weight of the water ; the quotient will be greater or less than unity, as the liquid experimented on is heavier or lighter than water. Now, to weigh equal bulks of two
หน้า 138 - as compared with hydrogen. Now, it has been already shown that water is composed of two volumes of hydrogen and one volume of oxygen ; and if the weight of one volume of hydrogen be taken as unity, that of two volumes hydrogen (=2) and one volume oxygen
หน้า 272 - but there are no chlorides corresponding with these oxides. The metals of the platinum group are not acted upon by nitric acid, but only by chlorine or nitro-muriatic acid. With the exception of osmium, they do not oxidize in the air at any temperature, and their oxides are all reducible by heat alone. These metals,
หน้า 320 - through a strong linen cloth, and the solid portion exposed to heat in a kind of retort, by which the remaining mercury is distilled off, and the silver left behind in an impure state. Considerable loss often occurs in the amalgamation process from the combination of a portion of the mercury with sulphur, oxygen,
หน้า 253 - by wires with the extremities of an active battery, oxygen is disengaged at the positive electrode, and hydrogen at the negative, in the proportion of one measure of the former to two of the latter nearly. This experiment has already been
หน้า 521 - AND MOLECULAR FORMULAE. A chemical formula is termed empirical when it merely gives the simplest possible expression of the composition of the substance to which it refers. A molecular formula, on the contrary, expresses the absolute number of atoms of each of its elements supposed to be contained in the molecule, as well as the mere
หน้า 354 - assumes the peculiar tenacious condition proper for working. The operation of fusion is conducted in large crucibles of refractory fireclay, which in the case of lead-glass are covered by a dome at the top, and have an opening at the side, by which the materials are introduced, and the melted glass withdrawn. Great care
หน้า 296 - Potassium hydroxide is a white solid substance, very deliquescent, and soluble in water; alcohol also dissolves it freely, which is the case with comparatively few potassium compounds ; the solid hydroxide of commerce, which is very impure, may thus be purified. The solution of this substance possesses, in the very highest degree, the properties termed