Laboratory manualGinn and Company, 1913 - 262 σελίδες |
Άλλες εκδόσεις - Προβολή όλων
Laboratory Manual: Arranged to Accompany a Course in General Chemistry William Edwards Henderson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Laboratory Manual: Arranged to Accompany the 2D Ed. of a Course in General ... William Edwards Henderson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
action alcohol alloys aluminium ammonia ammonium arsenic atomic weight barium base boiling point bromine burns calcium carbonate calcium hydroxide called carbon dioxide cathode cent changes Chemical conduct color colorless combines combustion composition compounds concentrated contains copper crystalline crystals decomposed decomposition density dissolved electric electrolyte elements energy equilibrium following equation formula furnace gases H₂ H₂O H₂SO heat hydrate hydrochloric acid hydrogen chloride hydrogen sulfide insoluble iodine ionization ions iron known lead liquid magnesium matter melting point mercury metals method mineral mixture molecular molecules nitrate nitric acid nitrogen obtained ordinary temperatures oxidizing agent oxygen peroxide phosphate phosphorus platinum potassium potassium chlorate powder precipitate prepared present properties pure quantity ratio reaction readily reducing agent resulting salts silicates silicon silver sodium carbonate sodium chloride solid soluble in water solvent substance sulfate sulfur dioxide sulfuric acid takes place tion tube valence volume zinc
Δημοφιλή αποσπάσματα
Σελίδα 93 - A more accurate method is the following, in which the oxygen is removed hy combination with hydrogen. A eudiometer tube is filled with mercury and inverted in a vessel of the same liquid. A convenient amount of air is then introduced into the tube and its volume accurately noted. There is then introduced more than sufficient hydrogen to combine with the oxygen present in the inclosed air, and the volume is again accurately noted. The mixture is then exploded by an electric spark, and the volume is...
Σελίδα 214 - ... relative weights. Several of these properties will now be discussed. 1. The volume of a gas is proportional to the number of molecules which it contains. There are many reasons for believing that this statement is true, though it is evident that its truth cannot be experimentally demonstrated. Historically its acceptance was based upon the formulation of a very important law, together with an hypothesis as to the meaning of the law. The law of Gay-Lussac. In the early years of the nineteenth...
Σελίδα 93 - ... from direct photographs. The region is homogeneous and the general order of the mean density is known. The next — and last — property to be discussed, the velocity-distance relation, emerged from the study of spectrograms. When a ray of light passes through a glass prism (or other suitable device) the various colors of which the light is composed are spread out in an ordered sequence called a spectrum. The rainbow is, of course, a familiar example. The sequence never varies. The spectrum...
Σελίδα 129 - By comparing the weight of the 3 volumes of hydrogen with that of the 1 volume of nitrogen we can determine the proportion by weight in which these two elements combine to form ammonia. The results are expressed by the formula...
Σελίδα 125 - Inasmuch as ammonia is formed in certain natural processes which are constantly taking place about us, such as the decay of nitrogenous organic matter, it is easy to understand why this compound has been known for so long a time. It was originally prepared by heating such tissues as the hoofs and horns of animals, and the aqueous solution of the gas so obtained was termed spirits of hartshorn. The pure gas itself was first prepared by Priestley, in 1774, and its composition was determined soon after...
Σελίδα 52 - It is universally conceded that Morley's results are the most trustworthy yet obtained. Relation between any given volume of aqueous vapor and the volumes of the hydrogen and oxygen which combine to form it. When the quantitative synthesis of water is carried out at ordinary temperatures, the water vapor formed by the union of the hydrogen and oxygen at once condenses. The volume of the resulting liquid is so small that it may be disregarded in making the calculations. If, however, the experiment...
Σελίδα 215 - Fio. 108 been effected, a graduated collecting tube E is filled with water and inverted over the end of the delivery tube C, as shown in the figure. A small quantity of a liquid (from 0.1 to 0.2 g.) whose molecular weight is to be determined is weighed out in a minute bottle F, and the bottle is dropped in at D, the opening being quickly closed by a stopper.
Σελίδα 365 - ... called pink salt, which finds extensive use as a mordant in the dyeing industry. Stannic sulfide (SnS2). Stannic sulfide is precipitated as a bright yellow, amorphous powder, when hydrogen sulfide is conducted into an acid solution of a stannic compound. It is insoluble in water and in dilute acids, but is soluble in ammonium sulfide forming a sulfostannate : It can be obtained in the form of golden-bronze scales, which feel greasy to the touch, like graphite, by heating a mixture of stannous...