The Second Step in Chemistry, Or the Student's Guide to the Higher Branches of the ScienceChurchill, 1864 - 774 pàgines |
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The Second Step in Chemistry, Or the Student's Guide to the Higher Branches ... Robert Galloway Visualització completa - 1864 |
The Second Step in Chemistry, Or the Student's Guide to the Higher Branches ... Robert Galloway Previsualització no disponible - 2017 |
The Second Step in Chemistry, Or the Student's Guide to the Higher Branches ... Robert Galloway Previsualització no disponible - 2017 |
Frases i termes més freqüents
acetic acid acid radical action alcohol radicals aldehyde alkaline allyl ammonia ammonium anhydride anhydrous atomic weights atoms of hydrogen bases biatomic bibasic acids bodies boiling point bromide C₂ H C₂H carbonic acid chemical chloric acid chloride Cl₂ colloidal combination combustion composition compound condensation contain copper corresponding crystalline crystals cubic inches decomposed decomposition density diffusion distillation double elements equal equivalent ether ethyl ethylene formation formed formula gaseous gases glycerine glycol Glycolic acid H₁ H₂ H₂O hydrated oxide hydride hydrochloric acid hydrogen iodide iodine isomorphous liquid measure mercury metals mixture molecule monamines monatomic neutral nitric acid nitrogen O₂ obtained olefiant gas oxalic acid oxide oxygen peroxide phosphorus potash potassium pressure produced proportion quantity reaction replaced salts soda sodium solid soluble solution specific gravity specific heat student substances substitution sulphate sulphuric acid temperature triatomic tube vinic volatile zinc
Passatges populars
Pàgina 483 - When the formulae of inorganic chemical compounds are considered, even a superficial observer is struck with the general symmetry of their construction ; the compounds of nitrogen, phosphorus, antimony, and arsenic especially exhibit the tendency of these elements to form compounds containing...
Pàgina 673 - The colloidal is, in fact, a dynamical state of matter, the crystalloidal being the statical condition. The colloid possesses Energia. It may be looked upon as the probable primary source of the force appearing in the phenomena of vitality. To the gradual manner in which colloidal changes take place (for they always demand time as an element) may the characteristic protraction of chemico-organic changes also be referred.
Pàgina 192 - A very valuable use of electro-chemical equivalents will be to decide, in cases of doubt, what is the true chemical equivalent, or definite proportional, or atomic number of a body ; for I have such conviction that the power which governs electro-decomposition and ordinary chemical attractions is the same...
Pàgina 192 - I have such conviction that the power which governs electro-decomposition and ordinary chemical attractions is the same ; and such confidence in the overruling influence of those natural laws which render the former definite, as to feel no hesitation in believing that the latter must submit to them also.
Pàgina 218 - The method here employed, of stating the rational constitution of bodies by comparison with water, seems to me to be susceptible of great extension, and I have no hesitation in saying that its introduction will be of service in simplifying our ideas, by establishing a uniform standard of comparison by which bodies may be judged of.
Pàgina 137 - Mercuric iodide separates from solution, and likewise sublimes at a very gentle heat, in scarlet tables belonging to the dimetric system; but when sublimed at a higher temperature in sulphur-yellow, rhombic tables of the monoclinic system. The red crystals turn yellow when heated, and resume their red tint on cooling. The yellow crystals obtained by sublimation retain their colour when cooled ; but, on the slightest rubbing or stirring with a pointed instrument, the part which is touched turns scarlet,...
Pàgina 673 - It may remain fluid for days or weeks in a sealed tube, but is sure to gelatinize and become insoluble at last. Nor does the change of this colloid appear to stop at that point ; for the mineral forms of silicic acid, deposited from water, such as flint, are...
Pàgina 670 - A certain parallelism is maintained between the two classes, notwithstanding their differences. The phenomena of the solution of a salt or crystalloid probably all appear in the solution of a colloid, but greatly reduced in degree. The process becomes slow; time, indeed, appearing essential to all colloidal changes. The change of temperature, usually occurring in the act of solution, becomes barely perceptible.
Pàgina 669 - Every physical and chemical property is characteristically modified in each class. They appear like different worlds of matter, and give occasion to a corresponding division of chemical science. The distinction between these kinds of matter is that subsisting between the material of a mineral and the material of an organized mass.
Pàgina 673 - Even while fluid a colloid may alter sensibly, from colorless becoming opalescent; and while pectous the degree of hydration may become reduced from internal change. The gradual progress of alteration in the colloid effected by the agency of time, is an investigation yet to be entered upon.