An Introduction to Pharmaceutical ChemistryJ. van Voorst, 1867 - 447 pages |
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Page 21
... pressure , expand equally when heated , and contract equally when cooled ; equal volumes must , therefore , be similarly constituted , must contain an equal number of molecules ( the diminutive of SYMBOLS , FORMULÆ , EQUATIONS . 21.
... pressure , expand equally when heated , and contract equally when cooled ; equal volumes must , therefore , be similarly constituted , must contain an equal number of molecules ( the diminutive of SYMBOLS , FORMULÆ , EQUATIONS . 21.
Page 22
... molecule of hydrochloric acid contains a particle of hydrogen and a particle of chlorine . Therefore the 1000 molecules of hydrogen must have contained 2000 particles , and the 1000 molecules of chlorine , 2000 particles of chlorine ...
... molecule of hydrochloric acid contains a particle of hydrogen and a particle of chlorine . Therefore the 1000 molecules of hydrogen must have contained 2000 particles , and the 1000 molecules of chlorine , 2000 particles of chlorine ...
Page 23
... molecule containing two atoms of H to one of O. This body is water . There is a third body equal in importance to ... molecule is com- posed of two atoms ; so that equal volumes contain an equal number of atoms . Now , bulk for bulk ...
... molecule containing two atoms of H to one of O. This body is water . There is a third body equal in importance to ... molecule is com- posed of two atoms ; so that equal volumes contain an equal number of atoms . Now , bulk for bulk ...
Page 24
John Attfield. cule of hydrogen ; for molecules are equal in bulk . And as the molecules of chlorine and hydrogen contain two atoms each , the atom of chlorine must be 35.5 times as heavy as that of hydro- gen = 1 . By parity of ...
John Attfield. cule of hydrogen ; for molecules are equal in bulk . And as the molecules of chlorine and hydrogen contain two atoms each , the atom of chlorine must be 35.5 times as heavy as that of hydro- gen = 1 . By parity of ...
Page 26
John Attfield. bonic acid gas , CIVO , again , is a saturated molecule containing one quadrivalent and two bivalent atoms . The student will find , as he proceeds , that what has been stated regarding the real and apparent quantivalence ...
John Attfield. bonic acid gas , CIVO , again , is a saturated molecule containing one quadrivalent and two bivalent atoms . The student will find , as he proceeds , that what has been stated regarding the real and apparent quantivalence ...
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Common terms and phrases
acetic acid acid gas acidulous radical add solution alcohol alkaline aluminium ammonia analysis Analytical Reactions antimony aqueous solution arsenic arsenicum Atomic weight barium basylous bismuth boiling British Pharmacopoeia calcium carbonate of potassium carbonate of sodium carbonic acid carbonic acid gas chemical chloride of calcium chromate of potassium colour compounds containing copper crucible crystals cyanide dilute dissolved distilled drop elements ether evaporated excess ferric ferrous filter filtrate formula glass grains grammes H₂O heat hydrate hydrochloric acid hydrocyanic acid hydrogen hyposulphite insoluble iodide of potassium iodine iron lead lime liquid magnesium mercury metal mixture molecular weight molecule neutral nitrate of silver nitric acid obtained odour officinal ounce oxalic acid oxide oxygen perchloride phosphate phosphoric acid platinum potassium prepared present produced pure residue salt small quantity soda sodium specific gravity starch substance sulphate sulphide sulphuretted hydrogen sulphuric acid sulphydrate of ammonium Synthetical test-tube tion tube washed yellow yield zinc
Popular passages
Page 326 - ... is the weight of a bulk of water equal to the bulk of the light body. For instance, a piece of wood weighing 12 grammes (or grains) is tied to a piece of metal weighing 22 grammes, the loss of weight of the metal in water having been previously found to be 3 grammes.
Page 324 - To express the same thing by rule, divide the weight in air by the loss of weight in water, the resulting number is the specific gravity in relation to 1 part of water, the conventional standard of comparison.
Page 362 - ten grains dissolved in water, and nitrate of silver added in excess, give a precipitate which, when washed with water and afterwards with half an ounce of solution of ammonia, and dried, weighs 12-5 grains.
Page 318 - Millilitre = 1 cub. centim. or the mea. of 1 gram, of water 1 Centilitre= 10 „ 10 „ „ 1 Decilitre = 100 ,. 100 „ „ 1 Litre =1000 „ 1000 ,, (1 kilo.) MEASURES OF LENGTH. 1 Millimetre = the thousandth part of one metre, or...
Page 279 - ... measures agitated with an equal volume of water are reduced to 45 by an absorption of 10 per cent...
Page 376 - ... minims of hydrochloric acid, and allow it to macerate for twenty-four hours. Transfer the whole to a small percolator, and after the fluid has ceased to drop, add at intervals about an ounce and a-half of similarly acidulated water, or until the fluid which passes through is free from colour.
Page 306 - ... and, stirring the whole together assiduously, continue the evaporation at a temperature not exceeding 140° F. until the extract is of a suitable consistence for forming pills.
Page 377 - Take of Opium 100 grains; Slaked Lime, 100 grains; Distilled Water, 4 ounces. Break down the Opium, and steep it in an ounce of the water for twenty-four hours, stirring the mixture frequently. Transfer it to a displacement apparatus and pour on the remainder of the water in successive portions, so as to exhaust the Opium by percolation. To the infusion thus obtained, placed in a flask, add the Lime ; boil for ten minutes, place the undissolved matter on a filter, and wash it with an ounce of boiling...
Page 305 - For educational practice either of the above-named five raw materials may be employed ; but in order that attention may be concentrated on the process by which the extracts are prepared, rather than on any one of the extracts themselves, it suffices to make an extract of some ordinary green vegetable, such as cabbage or turnip-tops. Bruise the green leaves of a good-sized cabbage in a mortar, and press out the juice; heat it gradually to 130° F., and remove the green flocks of chlorophyll which...