| 单词 | water of crystallization |
| 例句 | A crystallizable compound of a salt with alcohol, in which the latter plays a part analogous to that of water of crystallization. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Somewhat analogous to double salts are the molecular compounds formed by the introduction of “water of crystallization,” “alcohol of crystallization,” &c. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z At ordinary temperatures it crystallizes from aqueous solutions in large colourless monoclinic prisms, which effloresce in dry air, and at 35�C. melt in their water of crystallization. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z In 1835 he published the results of an examination of the properties of water of crystallization as a constituent of salts. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Sodium thiosulphate is a comparatively stable cheap salt, containing 5 molecules of water of crystallization, Na2S2O3·5H2O but 7 parts are necessary to remove 1 part by weight of chlorine. Chlorination of Water 2011-09-13T02:00:32.243Z Arsenic acid, H3AsO4, is prepared as shown above, the compound 2H3AsO4�H2O on being heated to 100� C. parting with its water of crystallization and leaving a residue of the acid, which crystallizes in needles. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" When heated, its water of crystallization is driven off, and it becomes light and spongy with slightly corrosive properties, and is used as a caustic under the name of burnt alum. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide But crystals are also nourished and grow in the water of crystallization. The Mechanism of Life Crystals of ordinary borax swell up to a very great extent on heating, losing their water of crystallization and melting to a clear white glass. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" Raffinose crystallizes out of concentrated solutions, with five molecules of water of crystallization, in clusters of glistening prisms. The Chemistry of Plant Life Two layers of solution are formed, one ether and the other water coming from the water of crystallization. A Brief Account of Radio-activity At 150�C. it melts, and on the continued application of heat boils, giving off its water of crystallization. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" Moisture is evolved from substances containing water of crystallization or decomposed hydrates. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The salt melts in its water of crystallization at 75�, and the liquid thus obtained goes up to a density of 3.6. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 "Demijohn" to "Destructor" These crystals on heating to 130� C. lose the water of crystallization and leave a residue of the anhydrous peroxide. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" If moist radium chloride or a salt of radium containing water of crystallization is sealed in a glass tube, the gradual accumulation of hydrogen and oxygen will burst the tube. A Brief Account of Radio-activity When the first layer has reached a depth of a few thousand feet the rocks which contain the water of crystallization are subjected to a terrific heat. Complete Story of the San Francisco Horror By this method it is shown that water, when present as “water of crystallization,” behaves as if it were ice. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" What weight of water of crystallization does 1 kg. of borax contain? An Elementary Study of Chemistry The author has formed several salts of the base, all of a crystalline nature, and containing water of crystallization. Scientific American Supplement, No. 315, January 14, 1882 Discussion of the state of water of crystallization in a salt in solution. Scientific American Supplement, No. 561, October 2, 1886 This is no doubt correct, but it must be effected by regulating the time of baking, since by prolonging the operation all the water of crystallization can be expelled far below 300�. Scientific American Supplement, No. 794, March 21, 1891 The sulphocyanide of potassium, KCsy, is prepared by fusing ferrocyanide of potassium, deprived of its water of crystallization, intimately mixed with half its weight of sulphur and 17 parts of carbonate of potassa. Scientific American Supplement, No. 483, April 4, 1885 How could you prove that the water in crystals of common salt is not water of crystallization? An Elementary Study of Chemistry The hydrochlorate gives up a part of its water of crystallization at the ordinary temperature under a desiccator over sulphuric acid, and the whole of it upon heating.—Chemist and Druggist. Scientific American Supplement, No. 315, January 14, 1882 But of the twenty salts thus formed, some are anhydrous in the solid state, others have water of crystallization, up to ten molecules in the case of Na2SO4. Scientific American Supplement, No. 561, October 2, 1886 ANHYDRITE, a mineral, differing chemically from the more commonly occurring gypsum in containing no water of crystallization, being anhydrous calcium sulphate, CaSO4. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 The oxalic acid and the oxalates should be specially prepared to insure purity, the main difficulty lying in the preservation of the water of crystallization. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes They all crystallize in octahedra and contain twelve molecules of water of crystallization. An Elementary Study of Chemistry The alcohols are neutral in reaction, and the lower members possess the property of entering into combination with salts, in which the alcohol plays the role of water of crystallization. The Project Gutenberg Encyclopedia Volume 1 of 28 The proof is complete, water of crystallization cannot be attached to the salt in solution, or if it is, no heat is evolved on union more than with solvent water. Scientific American Supplement, No. 561, October 2, 1886 This salt readily effloresces; i.e. loses its water of crystallization, and is reduced to a powder. An Introduction to Chemical Science With the exception of sodium oxalate, these all contain water of crystallization which may be lost on standing. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes When heated borax at first swells up greatly, owing to the expulsion of the water of crystallization, and then melts to a clear glass. An Elementary Study of Chemistry The amount of solid sodium dichromate given is for the dry crystalline compound containing two molecules of water of crystallization. Organic Syntheses If water of crystallization exists in solution, it will be necessary to suppose that this agreement is accidental, which is absurd, as a glance at the probabilities will show. Scientific American Supplement, No. 561, October 2, 1886 On being heated, or exposed to the air, it loses its water of crystallization and becomes a white powder. An Introduction to Chemical Science To determine the quantity of the barium chloride required, it is necessary to include in its molecular weight the water of crystallization, since this is inseparable from the chloride when it is weighed. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The salts formed from these bases usually contain water of crystallization, which cannot be driven off without decomposing them more or less. An Elementary Study of Chemistry The crystals are in the form of small cubes and contain no water of crystallization; some water is, however, held in cavities in the crystals and causes the salt to decrepitate when heated. An Elementary Study of Chemistry Thomsen himself expressly states that he regards the dissolved state as one in which the conditions are comparable for all substances; this would be impossible if water of crystallization were present. Scientific American Supplement, No. 561, October 2, 1886 This is called "water of crystallization"; if it passes into the air by evaporation, the crystal crumbles to a powder- and is then said to effloresce. An Introduction to Chemical Science An examination of substances containing water of crystallization has shown that in every case the water is present in such proportion by weight as can readily be represented by a formula. An Elementary Study of Chemistry Cobalt salts, which contain water of crystallization, are usually cherry red in color; when dehydrated they become blue. An Elementary Study of Chemistry Many substances, as for example quartz, form crystals which contain no water of crystallization. An Elementary Study of Chemistry |
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