The Second Step in Chemistry, Or the Student's Guide to the Higher Branches of the ScienceChurchill, 1864 - 774 páginas |
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Página 44
... hydrogen , nitrogen , and chlorine are represented by the same numbers : this proves that the atomic volumes of these elements are the same ; that is to say , that their atoms occupy the same space , for instance , that an atom of ...
... hydrogen , nitrogen , and chlorine are represented by the same numbers : this proves that the atomic volumes of these elements are the same ; that is to say , that their atoms occupy the same space , for instance , that an atom of ...
Página 45
... hydrogen combine to form NH ,? 46. In what proportions by volume must hydrogen and oxygen combine to form water ? 47 ... atoms of these elements occupy the same space as the atoms of hydro- gen , chlorine , and nitrogen , because the ...
... hydrogen combine to form NH ,? 46. In what proportions by volume must hydrogen and oxygen combine to form water ? 47 ... atoms of these elements occupy the same space as the atoms of hydro- gen , chlorine , and nitrogen , because the ...
Página 46
... atoms of arsenic or two atoms of oxygen will occupy the same space as one atom of hydrogen , therefore their specific weights must be as follows : - Arsenic - Oxygen Hydrogen 150 16 1 Because two atoms of arsenic occupy the same space as ...
... atoms of arsenic or two atoms of oxygen will occupy the same space as one atom of hydrogen , therefore their specific weights must be as follows : - Arsenic - Oxygen Hydrogen 150 16 1 Because two atoms of arsenic occupy the same space as ...
Página 47
Robert Galloway. number of atoms , they must be brought together in the proportion , by volume , of 1 of the diatomic to ... hydrogen and sulphur combine , to form sulphide of hydrogen ? 51. In what proportions by volume must hydrogen and ...
Robert Galloway. number of atoms , they must be brought together in the proportion , by volume , of 1 of the diatomic to ... hydrogen and sulphur combine , to form sulphide of hydrogen ? 51. In what proportions by volume must hydrogen and ...
Página 52
... atoms of the latter class occupy double the space the atoms of the diatomic bodies occupy . As the specific gravity of oxygen is 16 times greater than that of hydrogen , if we take 8 as the specific gravity of oxygen and make that the ...
... atoms of the latter class occupy double the space the atoms of the diatomic bodies occupy . As the specific gravity of oxygen is 16 times greater than that of hydrogen , if we take 8 as the specific gravity of oxygen and make that the ...
Otras ediciones - Ver todas
The Second Step in Chemistry, Or the Student's Guide to the Higher Branches ... Robert Galloway Sin vista previa disponible - 2017 |
The Second Step in Chemistry, Or the Student's Guide to the Higher Branches ... Robert Galloway Sin vista previa disponible - 2017 |
Términos y frases comunes
acetic acid acid radical action alcohol alcohol radicals aldehyde alkalies allyl ammonia ammonium anhydride anhydrous arsenic atomic volume atomic weights atoms of hydrogen atoms of oxygen bases bodies boiling point bromide C₂ H C₂H cacodyl carbonic acid chemical chloride chloride of sodium Cl₂ combination combustion compounds contain copper corresponding crystals cyanic acid cyanide decomposed decomposition density diatomic diffusion distillation elements equal equivalent ether ethyl ethylene formation formed formula gaseous gases glycerine glycol glycolic acid gramme H₂ H₂O Hofmann hydride hydrochloric acid hydrogen iodide isomorphous liquid mercury metals mixture molecule monamines monatomic monobasic nitrate nitric acid nitrogen O₂ obtained olefiant gas oxalic oxide oxygen phosphorus potash potassium pressure produced quantity of heat reaction replaced salts soda solid soluble solution specific gravity specific heat student substances substitution sulphate sulphuric acid temperature thermometer triatomic tube vapour volatile zinc
Pasajes populares
Página 491 - 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...
Página 695 - 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.
Página 198 - 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...
Página 198 - 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.
Página 694 - Another and eminently characteristic quality of colloids is their mutability. Their existence is a continued metastasis. A colloid may be compared in this respect to water while existing liquid at a temperature under its usual freezing point, or to a supersaturated saline solution.
Página 692 - While soluble crystalloids are always highly sapid, soluble colloids are singularly insipid. It may be questioned whether a colloid, when tasted, ever reaches the sentient extremities of the nerves of the palate, as the latter are probably protected by a colloidal membrane, impermeable to soluble substances of the same physical constitution.
Página 694 - The inquiry suggests itself whether the colloid molecule may not be constituted by the grouping together of a number of smaller crystalloid molecules, and whether the basis of colloidality may not really be this composite character of the molecule.
Página 141 - 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,...
Página 692 - 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.
Página 692 - It has been observed that vegetable gum is not digested in the stomach. The coats of that organ dialyse the soluble food, absorbing crystalloids and rejecting all colloids. This action appears to be aided by the thick coating of mucus which usually lines the stomach. The secretion of free hydrochloric acid during digestion — at times most abundant — appears to depend upon processes of which no distinct conception has been formed. But certain colloidal decompositions are equally inexplicable upon...