68 P. T. CL EVE, 



Analysis: 



a. 0,1280 gr. gave 0,oeoo gr. platinum. 



h. 0,1110 gr. gave 15 C. C. nitrogen (temp. of water 15° Bar. 763 ra.m. t. 18°) 

 =0,0175 gr. nitrogen. 



The formula requires: 



Theory Experiment 



Platinum 197,88—46,57 46,87 



Nitrogen 70,00 — 16,'.? 15,81 



Hydrogen 13, oo 



Oxygen 144,00 



424,88 



( Br - 



™ . i^ NII, NH,.ONO, IT .-. Tr . . . n . , , . . r 



3. Bromonitrate, Pt NH N0 * + HA), Ii bromme is added to the solution ot 



Ur 3 ' ' ' 



the nitrate of platomonodiammine, the liquid assumes a yellow colour, and by evapo- 

 ration yields golden coloured crusts of small and confusedly crystallised scales. The 



bromonitrate is easily soluble in water. 



Analysis •' 

 0,4300 gr. gave 0,15.53 gr. platinum and 0,2895 gr. bromide of silver =0,1232 gr. 

 bromine. 



The formula requires: 



Theory Experiment 



Platinum 197,8.s — 35, o? 36,16 



Bromine 160,oo — 29,04 28,65 



Nitrogen 70, oo 



Hydrogen 11,00 



Oxygen 112,oo 



550,88 



The compound is completely deprived of its bromine by boiling with nitrate of 

 silver, by which reaction the preeediug nitrate is formed. 



IOH 

 NH 3 "NH 3 0. N 7 2 TT „ ,-ii i ii i 



nh .o.no +H 2 U . , was obtamed by double de- 

 Br. 



coinposition between the bibromonitrate (N:o 3) and nitrate of silver, sufficient only for 

 the precipitation of half of the bromine. The compound forms straw-coloured, imper- 

 fectly developed, microscopical scales, which are soluble in water without difficulty. 

 The cooled solution is not instantly precipitated by salts of silver, but, by boiling, the 

 bromine is completely separated. 



