Defn: A substance regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance.
Defn: A white, crystalline substance obtained as an anhydride of alanine, and regarded as an imido derivative of lactic acid.
Defn: A compound obtained as a yellowish gray powder by the action of acetyl chloride or acetic anhydride or ordinary tannic acid.
Nitric anhydride, a white crystalline oxide of nitrogen (N2O5), called nitric pentoxide, and regarded as the anhydride of nitric acid.
Apparently this anhydride is, in this respect also, quite different from the partly neutralised diphenylmethanedisulphonic acid.
If this is the true composition of the salt, then in sulphonfluoresceïn the anhydride condition must be broken up by boiling with BaCO{3} forming the salt thus.
Representing the formation of the anhydride as the first action.
The reaction therefore which takes place between ortho-sulpho benzoic acid and resorcin from its analogy to that taking place between phthalic anhydride and resorcin may be represented thus, as shown by Baeyer in his second paper (Ann.
Calculate the percentage composition of sulphurous anhydride and sulphuric anhydride.
To understand the reaction which occurs, it must be remembered that a volatile acid anhydride is expelled from its salts when heated with an anhydride which is not volatile.
It is the anhydride of an acid, and consequently it dissolves in fused alkalis to form silicates.
Anhydride or lactone of santonic acid, obtained from Levant wormseed.
Cover the casseroles and heat over the flame of the burner, holding the casserole in the hand and rotating it slowly to hasten evaporation and prevent spattering, until the heavy white fumes of sulphuric anhydride are freely evolved (Note 3).
Whatever the character of the compound may be, it has been shown that it loses sulphuric anhydride upon ignition, causing low results, even though the precipitate contains iron.
The chromic oxide is dissolved by the flux and oxidized to chromic anhydride (CrO{3}) which combines with the alkali to form sodium chromate.
This matter has been fully discussed in connection with the phosphoric anhydride determination.
Sulphuric anhydride hisses when it is thrown into water, chemical combination taking place and sulphuric acid being formed.
Both varieties of arsenious anhydride are acid to test-paper.
Arsenious anhydride is also used for the preservation of wood, and is thrown occasionally into the holds of vessels in large quantities to prevent vegetable decomposition.
Unless the precipitation takes place at a boiling temperature, the carbonic anhydride retains a portion of the oxide of zinc in solution.
Buckheim isolated by means of ether an acrid resin, which was converted by saponifying agents into mezereic acid; the acrid resin is the anhydride of the acid.
In "Miller's Chemistry" it is stated it "may be obtained by boiling solutions of arsenious anhydride and cupric acetate, and adding to the mixture an equal bulk of cold water.
The phthalein formed from gallic acid and phthalicanhydride really results from the union of the latter with pyrogallol.
Baeyer, the eminent chemist who subsequently synthesised indigo, published the first of a series of investigations describing the compounds produced by heating phthalic anhydride with phenols.
One of the first discovered was produced by heating phthalic anhydride with an acid known as gallic acid, which occurs in vegetable galls, and in the form of tannin in many vegetable extracts which are used by the tanner.
With phthalic anhydride gives fluorescein and dyes of eosin and rhodamin series.
This refrigerator is like those which we employ in our sulphurous anhydride frigorific apparatus.
Acetic anhydride converts the base into an acetamino-dimethyl pyrimidine, acetic acid and acetamide being also formed.
It can also be synthesized by heating catechol with phthalicanhydride and sulphuric acid at 150 deg.
It condenses with acetic anhydrideto form a methyldiphenyl triazine, acetamide being also formed; with acetyl-acetone to form dimethylphenyl pyrimidine (A.
When distilled with phosphoric anhydride they yield nitriles.
A substance regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance.
A white, crystalline substance obtained as an anhydride of alanine, and regarded as an imido derivative of lactic acid.
True carbonic acid has not yet been obtained in any satisfactory condition, although the solution of carbonic anhydride (often called carbonic acid), or anhydrous carbonic acid, is generally regarded as such.
From most of them carbonic anhydride or anhydrous carbonic acid can be easily expelled by heat.
Dr Smith estimated the amount of carbonicanhydride evolved under differing conditions, and found that-- Carbonic acid exhaled per minute in grains.
The relative amounts of carbonic anhydrideeliminated from the lungs during periods of rest and exercise have also been investigated by Pettenkofer and Voit.
They are hurtful because they lessen the exhalation of carbonic anhydride from the lungs.
This increased exhalation of carbonic anhydride also points to the importance of thorough ventilation when indoor exercise is taken, particularly by large bodies of men or women, as in riding schools and on the treadmill.
The term applied by miners to carbonic anhydride (carbonic acid) and other irrespirable gases and vapours evolved in mines.
It is then evaporated to dryness, when the nitric acid is volatilised, and pure chromic anhydride left behind.
The large amount of carbonic anhydride given off by the lungs during bodily exercise explains the advantages of open air exercise, and why walking in the fresh air produces such excellent effects in some forms of dyspepsia.
A mixture of sulphide of carbon and solid carbonic anhydride forms almost the most powerful frigorific agent known.
Hirn and Speck appear to have conclusively proved that the formation of the carbonic anhydride occurs in the muscles, and that it is rapidly carried off from them.
Care must be taken to get rid of carbonic anhydride formed during the operation.
Carbonic anhydride and hydrogen are evolved by this reaction.
It is very inflammable, burning in the air with a bluish-yellow flame, evolving much heat, leaving no residue, and forming vapors of carbonic anhydride and water.
If cellulose is heated with acetic anhydride at 180 deg.
Acetic anhydride is added in small quantity, and 100 parts of acetyl chloride.
It is not necessary to filter the solution of the melt in this case, but sufficient time must be allowed for the hydrolysis of the anhydride before proceeding with the neutralization.
The anhydride may be tested for strength by the following method: Into a weighed stoppered vessel, containing 10 to 20 cc.
If a turbidity is noticed toward the end of the neutralization it is an indication that the anhydride is incompletely hydrolyzed and inasmuch as the indicator is withdrawn from the solution, results may be incorrect.
It is worthy of note that in the presence of much free anhydride a compound is formed with phenolphthalein, soluble in alkali and acetic acid, but insoluble in neutral solutions.
To carry out this test shake 2 cubic centimeters of the fatty acids with 5 cubic centimeters of acetic anhydride; warm slightly; cool; draw off the anhydride and add 1:1 sulfuric acid.
If a rubber stopper is used it should have had a preliminary treatment with hot acetic anhydride vapor.
Then add anhydrous sodium acetate and acetic anhydride in the usual amounts and proceed as described in the regular analysis.
As the acetic anhydride and sodium acetate may contain impurities which affect the result, it is necessary to make a blank test, using the same quantities of acetic anhydride, sodium acetate and water as in the analysis.
Carbonic anhydride exists in nature, both in a free state and in the most varied compounds.
It must be preserved in carefully closed vessels, because it absorbs water and carbonic anhydride from the air.
The presence of carbonic anhydride in solution in water is essential to the nourishment and growth of water plants.
The liquefied carbonic anhydride flowed down the tube K into the tube H, in which it was subjected to a low pressure by the pump E, and thus gave a very low temperature of about -140°.
When acting on each other they evolve a large quantity of heat, and when acting on intermediate hydrates they also evolve heat to a considerable degree, as we saw in the combination of lime and sulphuric anhydride with water.
This is insoluble in water, and is not affected by hypochlorous anhydride, so that the solution will contain hypochlorous acid only, but the greater part of it splits up into the anhydride and water.
But the ammoniacal solutions at the same time absorb carbonicanhydride from the air, and ammonium carbonate remains in the solution.
The loss of weight in grains, if doubled, at once indicates the percentage richness of the mineral examined in manganic peroxide; or, more correctly, every grain of carbonic anhydride evolved represents 1.
The vanadic anhydride may be obtained from the ammonic vanadiate by heating an aqueous solution of the salt in the open air, when the ammonia is driven off, and the vanadic anhydride is left behind.
Sulphurous anhydride is evolved with the vapours of metallic mercury, these being at the same time condensed by cooling.
Obtained as a dark purple liquid by passing a current of carbonic anhydride through sodium manganate.
The calcined mass is next reduced to a milk with water in a suitable cistern, and the carbonic anhydrideresulting from its own calcination forced into it under powerful pressure.
Carbonic anhydride is liquefied on the large scale by condensing it in strong vessels of gun-metal or boiler-plate.
When ignited, it burns with a bluish flame, to water and sulphurous anhydride if the combustion take place in a sufficient quantity of air, but if the supply of air be too limited, sulphur is deposited.
The solution by evaporation yields the heavy carbonate, whilst carbonic anhydride is expelled, and may be again used in the same manufacture.
The water employed must also be of the purest quality, the carbonic anhydride well washed with water, and the corks so prepared that they will not impart their peculiar flavour to the beverage.
If nitrous anhydride be mixed with water at temperatures below 0 deg.
It condenses with phthalic anhydride to form rhodamine, and with succinic anhydride to rhodamine S.
Immediately it comes in contact with atmospheric moisture phosphoric anhydride is converted into phosphoric acid, but this also occurs at first as a solid substance.
When a gas containing phosphorus is burnt beneath such a mantle, the phosphoric anhydride attacks those oxides, partially converting them into the respective phosphates, and these bodies are less refractory.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "anhydride" in a variety of sentences. We hope that you will now be able to make sentences using this word.
