Plumbic

Plictran Plioflex Plot plan PLP-DPG-PLP Plug valves Plumbic acetate Plumbing applications PlumbopaHadimte Plumbostanmte Plumbous acetate Plume containment Plummer s disease Plums... 

Lead forms two series of compounds corresponding to the oxidation states of +2 and +4. The +2 state is the more common. Compounds of lead(IV) are regarded as covalent, those of lead(II) as primarily ionic. Lead is amphoteric, forming plumbous (Pb(II)) and plumbic (Pb(IV)) salts as well as plumbites and plumbates, respectively. 

Plumbi-. plumbic, plumbi-, lead(lV). -oxyd, n. plumbic oxide, lead dioxide, lead(IV) oxide, -salz, n. plumbic salt, lead(IV) salt, -verbindimg, /. plumbic compoimd, lead(IV) compound. 

Whereas stannic oxide is neither oxidizing nor reducing, plumbic oxide is a powerful oxidizer. 

Lead forms amphoteric compounds in +2 and +4 valence states, forming plumbous and plumbic salts, such as PbCL and PbCL, as well as plumbites and plumbates, such as Na4Pb03 and Ca2Pb04,. Over a thousand compounds of lead are known which include divalent and tetravalent salts, complexes, and organometaUics. Divalent compounds of lead are far more numerous than the tetravalent compounds. Most compounds, however, result from the reactions involving other lead compounds, rather than elemental lead. Only the reactions involving elemental lead are outlined briefly below. 

Formula Ph(C2Hs02)4 MW 443.38 Synonyms plumbic acetate lead(lV) acetate... 

Primer compn for small arms ammo Tri-nitroresorcinol 15, Pb thiocyanate 20, K chlorate 50 Pb styphnate 15%) Ibid, USP 1416122(1922) (Similar to above but Di-plumbic di-trinitroresorcinol is used instead of Trinitroresorcinol) Ibid, USP 1416123 (1922) (Similar to above except that MF is used in lieu of Pb nitroresorcinol compds)... 

Hydroxyl is a powerful oxidizing agent it converts, for instance, plumbic sulphide into plumbic sidplmte ... 

BrepanUum.— Bj mixing phosphoric oxytriohloride and plumbic nitrate... 

Potassic seleniate is prepared by fbsing seleniam or metallio selenides with nitre. The acid is obtained by transforming the potassic salt into a plumbic salt, and subsequently deoompo-ring the latter with hydrosulphuric acid. 

PreparaHm. 3j decomposing plumbic periodate with sulphuric acid —... 

Formic acid from any of these sources is obtained in the concentrated state by decomposing plumbic formate with sulphuretted hydrogen, and a nrarda rectifying the amd over plumbic fonuato —... 

Di plumbic dinitroresorcinol see Lead 4,6-dinitro-resorcinate 5 D1275... 

The fixed residue supposed to contain barytic, sul-phato, -white lead, and chalk, may now be treated with pure and dilute nitric acid any insoluble matter.still remaining is set aside for examination, and the solution in nitric acid, which, if it was attended with, effervescence, showed the presence of carbonic acid, may be, if necessary, diluted with watsr,- Solution of sulphids of hydrogen gas is then added, and a black precipitata obtained, if lead be present. The clear, liquid filtered from the plumbic sulphide is next neutralized by ammonia, and osalats of ammonia added. A whits precipitate proves the presence of lime. 

Plumbic powder No. 1 is made from lead nitrate 12 parts, potassium nitrate 2 parts, and black alder charcoal 3 parts.42 The materials are powdered and mixed, and then rolled in a wooden ball-mill with balls of hard lead (Pb 5, Sb 1) or brass or bronze. 

Lead dioxide is widely used as an oxidizing agent in the arts as well as in the laboratory. It reacts with strong bases with the formation of plumbates, M2Pb03 and dissolves in strong acids, presumably forming plumbic salts. It will not react with weaker acids, such as acetic (c/. the preparation of lead tetracetate, synthesis 17). 

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