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Pyrosulfuric acid

Two other principles that have been made commercially available are (11 rhe reaction between pyrosulfuric acid (H2S2O7) and water (water vapor in air) to form sulfuric acid aerosol and (2) rhe reaction between ritaiJium tetrachloride (TiCl4) and water to form titanium dioxide (TiO,) and hydrogen chloride il Id), higure 12.5 shows two different hand-held, disposable smoke emitters. [Pg.1113]

Pyro-phosphorsaure, /. pyrophosphoric acid, -saure, /. pyro acid, -schleimsaure, /. pjto-mucic acid, furoic acid, -schwefelsaure, /. pyrosulfuric acid, disulfuric acid (H2S2O7). [Pg.351]

Disulfuric acid (also known as pyrosulfuric acid or oleum) also undergoes dissociation,... [Pg.348]

The acid produced when a molecule of water is removed from two molecules of H2S03 is disulfurous [pyrosulfurous) acid, H2S205. Even though the acid is not stable, a few salts are known that contain the S2053 ion, which has the structure... [Pg.540]

When S02 is added to a solution containing a sulfite, the S2052- ion is produced so the solution contains a salt of disulfurous acid (pyrosulfurous) acid. In aqueous solutions, these salts decompose when an acid is added. [Pg.540]

Sulfur trioxide produced above by the contact process is absorbed in sulfuric acid to form pyrosulfuric acid, H2S2O7, which is diluted with water to form sulfuric acid ... [Pg.900]

Disulfuric acid (also known as pyrosulfuric acid), H2S2O7, which is the major constituent of fuming sulfuric acid , is formed from sulfur trioxide and sulfuric acid ... [Pg.639]

Tin does not react direcdy with nitrogen, hydrogen, carbon dioxide, or gaseous ammonia. Sulfur dioxide, when moist, attacks tin. Chlorine, bromine, and iodine readily react with tin with fluorine, the action is slow at room temperature. The halogen acids attack tin, particularly when hot and concentrated. Hot sulfuric acid dissolves tin, especially in the presence of oxidizers. Although cold nitric acid attacks tin only slowly, hot concentrated nitric acid converts it to an insoluble hydrated stannic oxide. Sulfurous, chlorosulfuric, and pyrosulfuric acids react rapidly with tin. Phosphoric acid dissolves tin less readily than the other mineral acids. Organic acids such as lactic, citric, tartaric, and oxalic attack tin slowly in the presence of air or oxidizing substances. [Pg.57]

Pyrosulfurous acid, H2S2O5, is not a stable compound. Salts of the acid are stable and they contain the S2052 ion (sometimes considered as SO2 S032-) that has the structure... [Pg.364]

Salts of pyrosulfurous acid can be prepared by adding SO2 to solutions containing sulfite salts. Dissolving a pyrosulfite in water followed by the addition of an acid produces the bisulfite ion and S02 ... [Pg.364]

Sulfamic acid (amidosulfonic acid) itself can be obtained simply from urea and pyrosulfuric acid (disulfuric acid, H2S207) ... [Pg.243]

SYNS POTASSIUM METABISULFITE (DOT.FCC) PYROSULFUROUS ACID, DIPOTASSIUM SALT... [Pg.1168]

Aliphatic carboxylic acids may be sulfonated directly to sulfocar-boxylic acids in which the sulfonic acid group is on the a-carbon atom. Better results are sometimes obtained by sulfonation of the corresponding alkylmalonic acid followed by decarboxylation. Sulfonation of propionic anhydride with pyrosulfuric acid gives a-sulfopropionic acid (75%). Several simple olefinic acids containing a sulfonic acid group in the a-position have been made by direct sulfonation of a.,/3-olefinic acids or /3-halo acids. In the latter case, dehydrohalogenation accompanies sulfonation. [Pg.411]

One of the few substances found to behave as an acid m sulforic acid is disulltiric (pyrosulfuric) acid, it is formed from sulfor trioxide and sulfunc add ... [Pg.195]

It also dissolves readily in sulfuric acid, to form oleum or fuming sulfuric acidj which consists mainly of disulfuric acid, HgSgO (also called pyrosulfuric acid) ... [Pg.366]

What chemical reactions take place when water is added to pyrosulfuric acid and to pyrophosphoric acid Which of these reactions takes place the more readily ... [Pg.443]

Pyrosulfuric acid is produced by dissolving sulfur trioxide in concentrated sulfuric acid ... [Pg.146]

Pyrosulfuric acid, H2S2O7, is then diluted with water to make H2SO4 ... [Pg.146]

The prefix pyro means heat or fire. Pyrosulfuric acid may also be obtained by heating concentrated sulfuric acid, which results in the ehmination of one molecule of water fi-om two molecules of sulfuric acid. [Pg.955]

Because sulfur trioxide reacts violently with water, it is bubbled through 98 percent concentrated sulfuric acid and forms pyrosulfuric acid, H2S2O7. [Pg.425]

When water is added to the pyrosulfuric acid, high-quality, 98 percent concentrated sulfuric acid is formed. [Pg.425]

See other pages where Pyrosulfuric acid is mentioned: [Pg.274]    [Pg.831]    [Pg.85]    [Pg.243]    [Pg.104]    [Pg.543]    [Pg.937]    [Pg.525]    [Pg.831]    [Pg.1571]    [Pg.187]    [Pg.279]    [Pg.279]    [Pg.294]    [Pg.299]    [Pg.367]    [Pg.73]    [Pg.243]    [Pg.3407]    [Pg.1860]    [Pg.440]    [Pg.514]    [Pg.1079]    [Pg.1092]    [Pg.1064]    [Pg.275]    [Pg.955]   
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See also in sourсe #XX -- [ Pg.971 ]

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See also in sourсe #XX -- [ Pg.3 , Pg.10 , Pg.12 , Pg.230 , Pg.231 ]



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