OXlMIDOtiULPHOXATES OR SULPHAZOTATES. 



83 



eighth of acetic acid in a complex formula, but to do «o would he 

 almost vain, for while the acetic acid was in other ])reparations also in 

 excess, the excess was variable though the total acetic a^id Avas still 

 about 4 per cent : — 



C'alo. Poiiuil. 



Lead (iovlS (i.VH» 



.Sulphur ,S-UG 8-14 



Acetic aci d ;> • 7 (S 4"2i\ 



(5) Ficc-.'iixtlis noniKil hi/druxii-lead potassium oximidosidphomite. 

 (ilOPb),5K,H,,(NSoO;),.— To form this salt calculation points to the 

 use of 7 mois, of the Kg salt and 5 mois, of normal lead acetate. It 

 was obtained by us Ijy taking -S mois, to 6 mois, of the respective 

 salts, the former in warm concentrated solution and the latter also in 

 concentrated solution. Almost immediately after mixino- them 

 together a dense granular but still somewhat ciu-dy ])recipitate 

 separated, which was drained on a tile. Air-dried, it lost weight in 

 a desiccator equal t(j 5'o })er cent.; the loss of 2H.() would be about 

 that. It was the dehydrated salt which was analysed. The equation 

 expressing its formation is — 



7KJ4(XS,U0, + olM,(O.U-), + 5HoO = (HOPb)Jv,H,<XS 



+ 10K2HXS,U,. 

 This sah is somewhat soluble in its mother-liquor. On addin"- more 

 ot the potassium salt to the mother-liquor, a precipitate (jf apparently 

 the salt next to be described formed. 



'ale. Fuuucl. 



Lead ■19-79 50-04 



Potassium 9*41^ 9-15 



Sulpliui- 12-34 li^-4() 



(6) Eiißit-niiiÜis iioniial oxij-lcad putassiiun o.ciuiidusididiunatc. 

 (OPb,)K,H(X.S^,0.)„, or the nonmU salt (HOPb)PbKe(XS20,)3.— Pro- 



