The elements of chemistry, inorganic and organic |
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Página 10
... give accuracy in the results . Atomic weight , or equivalent weight , is a term used to express the proportion in which bodies combine chemi- cally . The atomic theory was first promulgated by Dr. 10 ELEMENTARY CHEMISTRY .
... give accuracy in the results . Atomic weight , or equivalent weight , is a term used to express the proportion in which bodies combine chemi- cally . The atomic theory was first promulgated by Dr. 10 ELEMENTARY CHEMISTRY .
Página 16
... give rise to compounds similar in their composition and character to the salts which sulphuric , nitric , or some admitted acid forms when combined with these alkalies . Acids were formerly , and are still in many chemical works ...
... give rise to compounds similar in their composition and character to the salts which sulphuric , nitric , or some admitted acid forms when combined with these alkalies . Acids were formerly , and are still in many chemical works ...
Página 26
... give the experimenter more knowledge than any written instructions . India - rubber tubing , which can be purchased any size , is used for connecting glass tubes . In connecting glass tubes by means of india - rubber , the ends of the ...
... give the experimenter more knowledge than any written instructions . India - rubber tubing , which can be purchased any size , is used for connecting glass tubes . In connecting glass tubes by means of india - rubber , the ends of the ...
Página 30
... give the student a much better idea of its action than any written descrip- tion . The most careful explanation of any piece of me- chanism or apparatus must fall short of actual observa- tion ; and the teacher who attempts to teach ...
... give the student a much better idea of its action than any written descrip- tion . The most careful explanation of any piece of me- chanism or apparatus must fall short of actual observa- tion ; and the teacher who attempts to teach ...
Página 32
... give the proper knowledge . It would be just as reasonable to expect a man to learn the trade of a joiner by reading books on the construction of tools , as to expect a person to learn chemistry without proper apparatus ; but this ...
... give the proper knowledge . It would be just as reasonable to expect a man to learn the trade of a joiner by reading books on the construction of tools , as to expect a person to learn chemistry without proper apparatus ; but this ...
Términos y frases comunes
acetic acid alcohol alkalies alumina ammonia anhydrous antimony arsenic atmosphere baryta binoxide bleaching blue bodies boiling burns calcium carbonate of lime carbonate of soda carbonic acid caustic potash charcoal chemical chloric acid chloride cobalt colour colourless Combining number combustion composition compound contains copper crystalline crystals decomposed decomposition dilute dissolved elements evaporated flame forms formula gas jar gases Give glass HO,SO hydrate hydrochloric acid hydrogen hydrosulphuric acid insoluble iodine iron lead liquid magnesia manganese manufacture mercury metal mixed mixture NaCl neutral nitrate nitric acid nitrogen obtained odour oxalate oxide oxygen passing phosphate phosphoric acid phosphorus platinum potassium powder precipitate prepared produced properties Properties.-A protoxide pure quantity red heat retort salt sesquioxide silicate silver sodium soluble in excess soluble in water solution specific gravity suboxide substance sugar sulphate sulphuric acid Symbol temperature teroxide tube vapour vegetable volatile vols volume weight yellow zinc
Pasajes populares
Página 74 - The temperature may be increased by mixing hydrogen and oxygen in the proportion of two volumes of the former to one of the latter, and burning it from a safety jet.
Página 8 - Specific weight, or specific gravity, is the number which expresses the ratio which the weight of a cubic inch of the body bears to the weight of a cubic inch of distilled water at a temperature of 15-5° C.
Página 182 - Brass consists of about 30 parts ofzinc'and 70 of copper. Copper is sometimes externally converted into brass by exposure, when at a red heat, to the vapour of zinc. The gold wire of Lyons is manufactured from copper bars prepared in this manner. Gun metal consists of 90 parts of copper and 10 of tin. Bell metal contains a larger proportion of tin. Bronze consists of 91 parts of copper, 2 of tin, 6 of zinc, and I of lead.
Página 30 - On preparing a filter, the piece of paper should be first examined, by looking through it against the light, to ascertain that it is free from holes. The simplest filter is made by folding the paper twice in opposite directions...
Página 106 - ... artificial one is formed by sinking a shaft into the rock-salt, and, if necessary, introducing water. This, when saturated, is pumped up, and evaporated more or less rapidly in large iron pans. As the salt separates, it is removed from the bottom...
Página 6 - ... of the elements being constant. 2. When any body is capable of uniting with a second in several proportions, these proportions bear a simple relation to each other. 3. If a body. A, unite with other bodies, B, C, D, the quantities of B, C, D...
Página 104 - ... vitriol, in its crystallized state, has the composition CuSO4,5Aq, its molecular weight being 249.4. In this state it forms large blue crystals, which have a nauseous metallic taste, and a density of 2.27. It is soluble in between two and three times its weight of water at the ordinary temperature, and in less than its own weight of boiling water: the solution has a blue color, and a distinctly acid reaction. At a temperature of about 204° C. (400° F.) the salt becomes anhydrous and crumbles...
Página 173 - Chalk.—This is a manufactured article, prepared by adding a solution of carbonate of soda to a solution of chloride of calcium (both cheap salts), so long as a precipitate is thrown down.
Página 74 - ... atmosphere arranging themselves on the earth's surface according to their respective weights. This diffusive power of hydrogen renders it impossible to keep it for any length of time in bladders, or the best constructed gasholders, and when mixed with air from any leakage it explodes when ignited. Hydrogen is not a supporter of combustion. If a lighted taper be plunged into a jar of hydrogen it is extinguished ; the hydrogen burns only at the top of the jar, where it comes in contact with the...
Página 4 - When any body is capable of uniting with a second in several proportions, these proportions bear a simple relation to each other. 3. If a body, A, unite with other bodies, B, C, D, the quantities of B, C, D, which unite with A, represent the relation* in ic/nV/it/ity unite among themselves, in the event of union taking place.