Journal of the Chemical Society, Količina 111 ,1. delThe Society., 1917 |
Iz vsebine knjige
Zadetki 1–5 od 33
Stran 174
... hydrated to metaboric acid very rapidly , a much longer time is necessary for the next stage of the hydration . It may therefore be possible to calculate the molecular weight of metaboric acid in a freshly prepared solu- tion ...
... hydrated to metaboric acid very rapidly , a much longer time is necessary for the next stage of the hydration . It may therefore be possible to calculate the molecular weight of metaboric acid in a freshly prepared solu- tion ...
Stran 176
... hydrating to orthoboric acid . These values show a certain regularity which probably indicates that this reaction is a unimolecular one . The general rising tendency of the values for k suggests , however , that the molecular condition ...
... hydrating to orthoboric acid . These values show a certain regularity which probably indicates that this reaction is a unimolecular one . The general rising tendency of the values for k suggests , however , that the molecular condition ...
Stran 192
... hydrated diazoimide , COH - N - CH , N2 , 14H , O , either of these compounds giving the ratio of diazo to total nitrogen at 2 : 3 . The mode of formation and the ease with which the product couples with B - naphhol and aromatic amines ...
... hydrated diazoimide , COH - N - CH , N2 , 14H , O , either of these compounds giving the ratio of diazo to total nitrogen at 2 : 3 . The mode of formation and the ease with which the product couples with B - naphhol and aromatic amines ...
Stran 197
... hydrated chromium phosphate ; this , on being heated , leaves an amorphous , brown powder , which is the anhydrous compound . The precipitate obtained in the cold by the action of sodium phosphate on excess of chrome alum is lavender or ...
... hydrated chromium phosphate ; this , on being heated , leaves an amorphous , brown powder , which is the anhydrous compound . The precipitate obtained in the cold by the action of sodium phosphate on excess of chrome alum is lavender or ...
Stran 198
... hydrate having the composition CrP04,4H2O . On boiling the violet , crystalline hexahydrate with acetic anhydride , it forms a green , crystalline dihydrate ( as stated by Schiff , loc . cit . ) similar in appearance to the tetrahydrate ...
... hydrate having the composition CrP04,4H2O . On boiling the violet , crystalline hexahydrate with acetic anhydride , it forms a green , crystalline dihydrate ( as stated by Schiff , loc . cit . ) similar in appearance to the tetrahydrate ...
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Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
acetic acid acetone alcohol alkali ammonia amount anhydrous aqueous solution atomic weight benzene bismuthous oxide boiling boron trioxide bromine c.c. N₂ cent Chem chemical chemistry chemists chloroform CO₂ cobalt colour colourless compound concentration constant containing crystallised crystals decomposed decomposition density diazotisation dilute dissolved distillation dried emetine ester ether ethyl acetate excess experiments extracted filtrate formation formed formula furfuroids gave grams H₂O heated hydrated hydrobromide hydrochloric acid hydrogen chloride hydrogen oxalate hydrolysis insoluble iodide iodine isomerides liquid malt Meldola mercury metal method methyl methylpsychotrine mixture molecular molecule needles melting nitric acid nitrite nitrogen nitrous obtained oxide phthalyl chloride potassium precipitate prepared present quantity reaction readily soluble requires salt secondary affinity separated silver soap Society sodium carbonate sodium hydroxide solvent sparingly soluble specific rotatory power spinacene substance sucrose sulphate sulphur dioxide sulphuric acid temperature tion tube whilst yellow yield zirconium
Priljubljeni odlomki
Stran 573 - Little remains : but every hour is saved From that eternal silence, something more, A bringer of new things ; and vile it were For some three suns to store and hoard myself...
Stran 287 - An enquiry into the relative weights of the ultimate particles of bodies is a subject, as far as I know, entirely new : I have lately been prosecuting this enquiry with remarkable success. The principle cannot be entered upon in this paper ; but I shall just subjoin the results, as far as they appear to be ascertained by my experiments.
Stran 289 - ... combinations of them to exhibit to view in this way all the subjects that come under investigation; nor is it necessary to insist upon the accuracy of all these compounds, both in number and weight; the principle will be entered into more particularly hereafter, as far as respects the individual results. It is not to be understood that all those articles marked as simple substances, are necessarily such by the theory; they are only necessarily of such weights. Soda and potash, such as they are...
Stran 43 - The experiments described in this paper were undertaken with the object of detecting and investigating the Hall effect in the positive column of the ordinary electric discharge at low pressures.
Stran 194 - Application was made to the Government Grant Committee of the Royal Society for a grant of £250 for the hire of a vessel.
Stran 285 - ... that subtile part to be air, which having been imprisoned in the body, under a solid form, was set free, and rendered fluid and elastic by the fire. We may therefore safely conclude, that the volatile matter lost in the calcination of magnesia, is mostly air; and hence the calcined magnesia does not emit air, or make an effervescence when mixed with acids.
Stran 286 - I am nearly persuaded that the circumstance depends upon the weight and number of the ultimate particles of the several gases: those whose particles are lightest and single being least ahsorbable, and the others more according as they increase in weight and complexity.
Stran 289 - Berzelius's symbols are horrifying: a young student in chemistry might as soon learn Hebrew as make himself acquainted with them. They appear like a chaos of atoms .... and to equally perplex the adepts of science, to discourage the learner, as well as to cloud the beauty and simplicity of the Atomic Theory.
Stran 352 - Soon after his return, on September 22, 1914, Meldola presided at a joint meeting of the Councils of the Institute of Chemistry and the Society of Public Analysts to consider the supply of laboratory requirements. A special committee on laboratory reagents, and another on glass,* porcelain, and filter-paper, were the result. The last meeting he attended at the Institute was in...
Stran 570 - Ich sah, •wie grössere eine Reihe bildeten und nur an den Enden der Kette noch kleinere mitschleppten. Ich sah, was Altmeister KOPP, mein hochverehrter Lehrer und Freund, in seiner ,Molecularwelt' uns in so reizender Weise schildert — aber ich sah es lange vor ihm. — Der Ruf des Conducteurs ,Clapham road...