Plumbous hydroxide

The precipitate is allowed to settle and is washed five or six times by decantation. It is then thoroughly stirred with 50 ml. of 6N nitric acid to remove any calcium plum-bite or plumbous hydroxide and is again washed several times by decantation. Finally, it is filtered and allowed to dry. The yield is nearly quantitative. 

Lead dioxide may be made by the oxidation of plumbous hydroxide in alkaline solution. A convenient oxidizing agent is sodium or calcium hypochlorite. 

Let the precipitate settle, and wash two or three times by decantation. Then stir it with 50 ml 3N nitric acid to decompose plumbates and dissolve any plumbous hydroxide. Heat nearly to boiling and wash with hot water, first by decantation and then on the Buchner funnel. Suck it as dry as possible and complete the drying in the desiccator or on the steam bath. The yield should be about 85 per cent. 

Lead Oxide, Yellow, or Litharge (Lead Monoxide, Lead Protoxide or Plumbous Oxide). PbO, mw 223.21, yellow to yellowish-red, heavy, odorless pdr or minute, cryst scales mp 888°, bp (vol at red heat) d 9.53g/cc insol in w, ale sol in acet ac, dil nitric acid, in warm solns of fixed alkali hydroxides. It may be prepd in the lab by heating Pb nitrate, carbonate or hydroxide commercially, it is made by heating Pb to a temp considerably above its mp and continually skimming off the litharge produced. It is used in some primer compns... 

Apard [27] found that the addition of finely powdered plumbous oxide, calcium oxide or calcium hydroxide to a 1% nitrocellulose solution in acetone, ether-alcohol or amyl acetate initially brought about an increase of the viscosity. Further addition of these substances caused the nitrocellulose to coagulate, together with the added... 

Lead Fluoride. Lead difluoride plumbous fluoride. FjPb mol wt 245.21. F 15.50%, Pb 84.50%. PbF2, Prepd by treating lead carbonate or hydroxide with hydrogen fluoride and evaporating the soln by mixing solns of potassium fluoride and lead acetate by precipitation From the soln of a lead salt by HF by the action of fluorine on lead Ruff, Die Chemie des Fluors (Springer, Berlin, 1920)... 

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