Fustin, on heating with dilute sulphuric acid, gave fisetin and a sugar supposed to be rhamnose. |
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Twenty pounds of strong sulphuric acid are now to be introduced by the tubulure c, and then its lid must be put on. |
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An uncharged SO4 radicle would react with the water present, and sulphuric acid would be formed and oxygen liberated. |
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Each of the fractions was treated with concentrated sulphuric acid, and the undissolved portions were then re-fractionated. |
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Acids like sulphuric acid are termed bibasic, and their equivalent is only half the molecular weight. |
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Most generally it appears to be the muriatic, sometimes the phosphoric or sulphuric, and occasionally other acids. |
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Pure and dry olefiant gas is passed over anhydrous sulphuric acid contained in a U-shaped tube. |
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It also appears as an intermediate product in the electrolytic reduction of nitrobenzene in sulphuric acid solution. |
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A dilute acetic solution of veratrine is turned to a superb red by strong sulphuric acid. |
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Sulphate of zinc, or white vitriol, a combination of zinc with sulphuric acid. |
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Similarly we can make a Widnes fog by sulphureted hydrogen, chlorine, sulphuric acid, and a little steam. |
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A weak solution of soda dissolves this oxycellulose with a yellow colour, while strong sulphuric acid forms a pink colouration. |
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Prolonged soaking in a hot solution of potassium bichromate which has been acidified with sulphuric acid will often prove useful. |
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In such solutions sulphuric acid produces a white precipitate of baric sulphate, which is practically insoluble in all acids. |
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Concentrated sulphuric acid causes it to agglutinate into resin-like lumps, with the accession of an intense blood-red colour. |
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By the addition of diluted sulphuric acid, the aldehyde of cinnamic acid is afterwards procured pure. |
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The anthraquinone thus produced is washed and dissolved at a moderate heat in sulphuric acid. |
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Nitric Acid, or aqua fortis, is less frequently used as a poison than sulphuric acid. |
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From dilute sulphuric acid, neutralised with carbonate of barium, and the solution evaporated and crystallised. |
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If sulphuric acid is present it must be separated by treating the solution of the compound with barium chloride and filtering. |
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In determining it, it is first converted into sulphuric acid, and then precipitated and weighed as barium sulphate. |
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The blue mass is a mixture of the coloured substance with some sulphuric acid, sulphate of soda, and fats. |
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By heating the bromate it was partially converted into the bromide, and the resulting mixture was distilled with sulphuric acid. |
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The ore is first treated with dilute sulphuric acid, and then ferrous or calcium chloride added, thus forming copper chlorides. |
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If much sulphuric acid be present, it may be so concentrated by heating as to cause the carbonization of the paper. |
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When the crystals of citric acid are very deliquescent, the presence of free sulphuric acid may be suspected. |
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Finally they must be winced through dilute sulphuric acid to clear up the white, by removing the cupreous tinge. |
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The alkaline liquor is decanted and neutralised with sulphuric acid, and the precipitate thus formed is washed and collected. |
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The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution. |
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The ether, on evaporation, left the ester which was crystallized from water and dried in a desiccator over sulphuric acid. |
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They were kept a day or two in a desiccator over sulphuric acid, but did not become completely dry. |
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This saccharification of the starch may be accomplished by sulphuric acid or by the action of diastase. |
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This is better effected by an acid such as sulphuric acid, or by a diastase. |
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Distilled with dichromate of potassium and sulphuric acid it is converted into benzoic acid. |
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Of the third type the most common is that in which the dichromate is reduced by sulphuric acid and sodium bisulphite. |
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To collect and use the sulphuric acid of the salt cake consumed in the glass manufacture. |
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The minutest trace of digitalin moistened with sulphuric and treated with bromine vapour gives a rose colour, turning to mauve. |
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It is distinguished from santonin by giving no red colour when treated with sulphuric or phosphoric acids. |
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It may be readily distinguished from saponin by treating a watery solution with sulphuric or hydrochloric acid. |
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The finely-divided substance containing the dioxide is digested in a solution of a known quantity of iron in sulphuric acid. |
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After this we pour on a proper quantity of sulphuric acid, and the sebacic acid passes over by distillation. |
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Pabst proved this by letting methyl sulphuric acid act upon a mixture of acetic acid and ethyl alcohol. |
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Ether is a volatile liquid prepared from ethylic alcohol by interaction with sulphuric acid. |
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Filter and evaporate the filtrate until the fumes of sulphuric acid begin to be evolved, when 10 gr. |
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But if the fumarole continues active, hydrochloric acid issues with the smoke, and often some time after sulphuric acid. |
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This much is known, that the color and odor are removed by fuming sulphuric acid. |
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An excess of the trioxide may dissolve in the strong sulphuric acid, forming what is known as fuming sulphuric acid. |
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The guncotton is made by treating flax or cotton waste with sulphuric and nitric acids. |
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When sodium nitrate is treated with concentrated cold sulphuric acid, no chemical action seems to take place. |
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On digestion of its warm aqueous solution with warm dilute sulphuric acid, hydrazine sulphate and oxalic acid are obtained. |
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The experiments have been made with the vapors of two very volatile liquids, namely, sulphuric ether and hydride of amyl. |
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It gives with iodine and sulphuric acid a blue color and with iodine zinc chloride a violet and yields dextrose on hydrolysis. |
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Indol is absorbed and oxidized into indoxyl, which combines with potassium and sulphuric acid and is thus excreted. |
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The cables are insulated with rubber, upon which sulphuric acid has no effect. |
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The nitric acid used should be free from hydrochloric, sulphuric, iodic and telluric acids. |
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In other words, the zinc has taken the place of the hydrogen in sulphuric acid. |
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This is dried and then calcined, the sulphurous acid evolved being conducted into the sulphuric acid chamber. |
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This solution is colorless, and is tellurous acid, dissolved in sulphuric acid. |
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These are acidified with sulphuric acid and then treated with 95 per cent. |
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The tubes are filled with a weak solution of sulphuric acid. |
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When heated with concentrated sulphuric acid, it is oxidized to pyridine. |
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What weight of hydrogen can be obtained from 150 g. of sulphuric acid? |
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What weight of zinc can be dissolved in 10 g. of sulphuric acid? |
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It is also occasioned by anodic polarization of iron in sulphuric acid. |
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Then he describes the effects with sulphuric acid, and nitrous acid. |
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But his humour is bitter as gall, and corrosive as sulphuric acid. |
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The sulphuric scent of a match tells me that the lamps are being lighted. |
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We may supersaturate slightly the two bases with sulphuric acid. |
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The principal use of pyrite is in the manufacture of sulphuric acid. |
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Sulphate of quinine is made by the use of sulphuric acid as a solvent. |
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