Lead Acetate Dioxide

Analytical Methods. Detection of carbonyl sulfide ia air can be done by gas chromatography or by combustion to sulfur dioxide and determination of the latter. Where hydrogen sulfide and carbonyl sulfide occur together, the carbonyl sulfide can be determined by combustion after hydrogen sulfide is absorbed by lead acetate, which does not absorb carbonyl sulfide (35). 

An Alka-Seltzer tablet gives off carbon dioxide when dissolved in aqueous solution. The gas is used to drive hydrogen sulfide out of drilling fluid samples. The H S then reacts with lead acetate paper in the bottle cap. The degree of discoloration is related to hydrogen sulfide concentrations. 

Lead acetate is more satisfactory than sulfur dioxide for the removal of selenious acid, provided that the solution is kept cool and a large excess is avoided. 

Thenard A process for making white lead pigment (basic lead carbonate) by boiling litharge (lead monoxide) with lead acetate solution and passing carbon dioxide gas into the suspension. 

Thompson-Stewart A process for making basic lead carbonate ( white lead, 2PbC03Pb(0H)2), by reacting lead monoxide ( litharge ) with acetic acid and then with carbon dioxide. Basic lead acetate is an intermediate. See also Dutch, Carter. 

Lead carbonate is prepared by passing carbon dioxide into a cold dilute solution of lead acetate ... 

Oils Edible Safflower Potassium Binoxalate Ammonium Chloride Salicylic Acid Ammonium Chloride Lead Acetate Potassium Binoxalate Sodium Silicofluoride Ammonium Carbonate Fluocilicic Acid P-Dichlorobenzene Ammonium Phosphate Sec-Butyl Acetate Sec-Butyl Alcohol Calcium Phosphate Selenium Trioxide Selenium Dioxide Selenium Dioxide Selenium Dioxide Selenium Trioxide Antimony Trioxide Calcium Hypochlorite Carbaryl Cyclohexanone Charcoal... 

Pass a stream of carbon dioxide into the basic lead acetate solution obtained. What is the composition of the precipitate Write the equations of the reactions. 

The first commercially successfull synthetic nacreous pigments were hexagonal platelet crystals of lead salts Thiosulfate, hydrogen phosphate, hydrogen arsenate and most important nowadays, basic carbonate. Basic lead carbonate [1319-46-6] Pb(OH2) 2PbC03, Mr 775.7, is precipitated from aqueous lead acetate or lead propionate solutions with carbon dioxide ... 

Detection of Sulphur Dioxide.—This test is made on sugars from juices decolorised by means of sulphurous acid. To a solution of 10-15 grams of the sugar in about 25 c.c. of water in a flask are added a scrap of pure zinc (or 0-3-0-4 gram of magnesium wire) and 5 c.c. of pure hydrochloric acid. In presence of sulphur dioxide, hydrogen sulphide is evolved and may be detected by the odour or by means of a strip of lead acetate paper. 

Detection of Sulphur Dioxide.—Sulphurous anhydride, which is often added to tanning extracts, either as such or more often as sulphites, to enhance their keeping qualities, may be detected by treating 10 grams of the extract in a beaker with 20 c.c. of hydrochloric acid and 20 c.c. of water, a piece of pure zinc being added and the beaker covered with a clock-glass under which is suspended a strip of lead acetate paper if the extract contains sulphurous anhydride, the paper becomes brown or assumes a blackish tint with metallic reflection. If the paper remains white for 15 minutes, absence of sulphurous acid may be assumed. 

The oxidation of 1-hydroxy-2,3,4,5-tetraphenylpyrrole in benzene by lead(lV) dioxide (68BSF4679) gave the radical 3 which was reduced back to the hydroxypyrrole by lithium aluminum hydride. Photosensitized oxidation gave the peroxynitrone 4, which was reduced by potassium iodide in acetic acid to 5 (68BSF4679). ALPhenylmaleimide reacts at room temperature with 1-hydroxypyrrole to give the Diels-Alder-type adduct 6,... 

Hydrogen sulfide gas evolved, detected by holding lead acetate paper to mouth of test tube Evolution of sulfur dioxide gas Red compound of unknown composition... 

It is produced by several methods, in which soluble lead acetate is treated with carbon dioxide. For example, treatment of an aqueous slurry of finely divided lead metal or monoxide, or a mixture of both, with acetic acid in the presence of air and carbon dioxide produces very fine particle-size basic lead carbonate and ranges in carbonate content from 62 to 65% (theoretical 68.9% PbC03). 

Lead acetate or lead nitrate solution brown lead dioxide is produced on boiling ... 

Chromate, (i) Hydrogen peroxide test (IV.33, 4). (ii) Lead acetate solution test (IV.33,3). (iii) Action of hydrogen sulphide or sulphur dioxide (IV.33, 5,6). 

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