Sulphur and Its Compounds

Write the electron configuration of a diatomic sulphur molecule and compare it with that of an oxygen molecule. 

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Sulphur and its compounds in the air can become oxidised to sulphuric acid this forms soluble zinc sulphate, which is washed away by rain ... 

Z.A. Foroulis, High Temperature Metallic Corrosion by Sulphur and its Compounds, The Electrochemical Society, Princeton, New Jersey, 1970. 

The Analytical Chemistry of Sulphur and Its Compounds (in three parts). By J. H. Karchmer... 

Kelly, D.P., 1972. Transformations of Sulphur and its Compounds in Soiis. International Symposium on Sulphur in Agriculture, Versailles, 1970. Institute Nationale Recher-ches Agronomique, pp. 217—232. 

Historically, interest and importance have been particularly centred on sulphur and its compounds. At the present time increasing attention is being paid to nitrogen. However, more important still, is a precursor of ozone, which is known to... 

Several specialized bacterial species are able to produce strong mineral acids. For example, under aerobic conditions, Acidithiobacilli oxidize reduced inorganic sulphur compounds and sulphur to sulphuric acid (H2SO4). The energy derived from this oxidation is coupled to growth via special enzymes. Beside sulphur and its compounds, these bacteria need only carbon dioxide... 

Chemistry and Biochemistry of the Sulphydryl Group in Amino-acids, Peptides and Proteins , by M. Friedman, Pergamon, Oxford, 1973 Sulphur Research Trends , ACS Advances in Chemistry Series No. 110,1971 The Determination of Sulphur-containing Groups , by M. R. F. Ashworth, Vol. 1, Academic Press, London, 1972 The Analytical Chemistry of Sulphur and its Compounds , ed. J. H. Karchmer, Wiley-lnterscience, New York. 1972. 

Polish Industrial Standards, Test PN-74/C-04566 lor sulphur and its compounds determination... 

Carbon monoxide is produced by incomplete combustion of carbon and its compounds. In the laboratory it can be prepared by careful dehydration of formic or oxalic acid with sulphuric acid ... 

Bottom soil is quite different from soil on land, particularly if it is collected from an anaerobic zone. Bottom soil specimens also have varying composition. The presence of elementary sulphur and organic compounds of sulphur greatly complicates analysis of the residual organochlorine... 

Cyanogen unites directly with hydrogen and with the metals, bat Its oxygen combinations require to be indirectly formed there are three componnds of cyanogen and oxygen, which, are all acids, and are polymeric bodies. It combines also with sulphur, and Ite compounds with this elamont have a remarkable tendency to form double and triple combinations. 

Selenium resembles sulphur in its variations in valency, compounds being known in which the element is definitely bivalent, quadrivalent and sexavalent, respectively. The tendency to quadrivalency, however, is greater than in the case of sulphur, and the compounds formed in which this valency is exhibited are relatively more stable in the case of selenium than in the case of sulphur.5 Thus, whilst the bivalent selenium in organic selenides readily combines with a molecular proportion of chlorine or other halogen,5 sexavalent selenium in the selenates is easily reduced to the quadrivalent selenious condition. As with sulphur, it has been possible to demonstrate that in quadrivalent selenium the four valencies are disposed in three dimensions of space, since substances of the type... 

The part now played in chemical industry by sulphur and its wide variety of compounds scarcely needs emphasis. The astonishing increase in the production of sulphur and sulphuric acid during the last two decades, made possible by the discovery of the vast deposits of sulphur in Louisiana, is itself indicative of widespread applications. Many of the compounds of sulphur are notable for possessing valuable properties, and their use extends into almost every branch of- modern industry their chemical investigation has contributed much to the advancement of science and to the amenities of domestic life. Probably in no direction has sulphur more widely and directly influenced the general public than in connection with methods of transport, which have been revolutionised by the introduction of sulphur-vulcanised rubber as a wear-resisting, shock-absorbing material for the equipment of wheels of motor vehicles. 

The bleached cotton is thoroughly washed with water to remove residual chlorine and its compounds and then the alkalis are neutralized by acidifying with dilute sulphuric add. The product is then rinsed again with water to remove the mineral constituents. 

Arsenic Trichloride, AsC13, was discovered in 1648 by Glauber,4 who obtained it by heating in a retort a mixture of white arsenic, common salt and sulphuric acid a thick oil, which he designated butter of arsenic, collected in the receiver.5 The compound is produced in many reactions and is usually formed when arsenic and its compounds are... 

It may contain, as impurities or as additions, other cadmium compounds, zinc compounds and free sulphur, and it may also be adulterated with chrome yellow, cinnabar, arsenic sulphide, heavy spar and gypsum. 

Ostromyslensky [90] observed that rubber could be vulcanized in the absence of sulphur or its compounds if small quantities of aromatic nitro compounds, e.g. nitrobenzene, dinitro- or sym- trinitro-benzene, tetranitronaphthalene plus certain oxidizing compounds, such as benzoyl peroxide, were added to it. The resultant vulcanized rubber had mechanical properties not inferior to those of a product vulcanized by sulphur alone, and when free from accelerators it exhibited a greater resistance to ageing. Some metal oxides, such as PbO, CaO, BaO, promoted vulcanization by nitro compounds. Urea played the role of an accelerator of vulcanization. These observations have been confirmed in more recent studies by other workers. 

J) The compound contains no elements other than C, H, and O. It boils at 163°, is soluble in water, and liberates carbon dioxide from scdium carbonate. When warmed with alcohol and a small amount of sulphuric and it yields a compound which boils at 119°. 

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