ISBN: 1130131092

[EAN: 9781130131093], Neubuch, UNIVERSITY OF DURHAM. SOCIETY,SUBJECTS, This item is printed on demand. Paperback. This historic book may have numerous typos and missing text. Purchasers c… Plus…

[EAN: 9781130131093], Neubuch, UNIVERSITY OF DURHAM. SOCIETY,SUBJECTS, This item is printed on demand. Paperback. This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: . . . is prepared by reducing the trioxide in hydrogen, it is a black powder and forms the unstable molybdenum salts. The halogen compounds are numerous, each oxide having several corresponding chlorides and bromides. By passing chlorine over heated mixtures of molybdenum trioxide and carbon some of these chlorides and oxychlorides are obtained; they are all green or yellow compounds possessing a pungent smell, and rapidly combine with the moisture of the air, forming blue liquids. Molybdenum is prepared by the reduction of the trioxide with powdered aluminium, the mixture being placed in a crucible and fired by means of a magnesium powder; any unaltered aluminium being dissolved out with the hydrochloric acid. Pure molybdenum was found to be a very hard, silver white metal, and very infusible; soluble in nitric acid, but not attacked by dilute sulphuric or by hydrochloric acid. The molybdates are formed by the combination of the acidic molybdenum trioxide with basic oxides, and many complex molybdates can easily be obtained as Mono-Molybdates. . . BOMoO, aH, O Di-Molybdates. . . R2O2MoO, Tri-Molybdates. . . R2O8MoO etc. , the proportion of molybdenum steadily increasing up to 16 molecules as in the sodium molybdate NauMo16O49. The best-known molybdates are those of ammonium. Ordinary ammonium molybdates has the formula (nhmom H 4HO; it crystallizes in sixsided monoclinic prisms. Lead only forms one molybdate PbMoO4; this is prepared by adding a soluble lead salt to a soluble molybdate and comes down as a heavy white insoluble powder. The easy production and the insolubility of this salt under ordinary circumstances make it very useful as a means of estimating molybdenum. Calcium, barium and strontium form molybdates in the same way as lead. Nickel, cobalt . . . This item ships from La Vergne,TN.<

2012, ISBN: 1130131092

[EAN: 9781130131093], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers c… Plus…

[EAN: 9781130131093], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: .is prepared by reducing the trioxide in hydrogen, it is a black powder and forms the unstable molybdenum salts. The halogen compounds are numerous, each oxide having several corresponding chlorides and bromides. By passing chlorine over heated mixtures of molybdenum trioxide and carbon some of these chlorides and oxychlorides are obtained; they are all green or yellow compounds possessing a pungent smell, and rapidly combine with the moisture of the air, forming blue liquids. Molybdenum is prepared by the reduction of the trioxide with powdered aluminium, the mixture being placed in a crucible and fired by means of a magnesium powder; any unaltered aluminium being dissolved out with the hydrochloric acid. Pure molybdenum was found to be a very hard, silver white metal, and very infusible; soluble in nitric acid, but not attacked by dilute sulphuric or by hydrochloric acid. The molybdates are formed by the combination of the acidic molybdenum trioxide with basic oxides, and many complex molybdates can easily be obtained as Mono-Molybdates. BOMoO, aH, O Di-Molybdates. R2O2MoO, Tri-Molybdates. R2O8MoO etc., the proportion of molybdenum steadily increasing up to 16 molecules as in the sodium molybdate NauMo16O49. The best-known molybdates are those of ammonium. Ordinary ammonium molybdates has the formula (nhmom H 4H O; it crystallizes in sixsided monoclinic prisms. Lead only forms one molybdate PbMoO4; this is prepared by adding a soluble lead salt to a soluble molybdate and comes down as a heavy white insoluble powder. The easy production and the insolubility of this salt under ordinary circumstances make it very useful as a means of estimating molybdenum. Calcium, barium and strontium form molybdates in the same way as lead. Nickel, cobalt .<