38 l J . T. C LE VE, 



The formula requires: r PI ^ 



^ Ineory Experiment 



Platinum 46,y? 47,42 



Chlorine 8,42 8,<>3 



8. Bichloro-nitrite 2C1 . Pt . w H 3 no was °btained when a concentrated solution 

 of the nitrato-nitrite (N:o 6) was heated with hydrochloric acid in excess. The com- 

 pound is soon thrown down as small rhombical shining and colourless seales, easily so- 

 luble in hot water, but only with difficulty in cold. The solution is not precipitated 

 by salts of silver. 



Analysis the salt dried at 100°: 



0,4740 gr. gave 0,2350 gr. metallic platinum and 0,3100 gr. chlori de of silver =0,0766 

 gr. chlorine. 



The formula requires n, ^ ^ , ^ t* 



1 Calculated Experiment 



Platinum 50,12 49,59 



Chlorine 17,96 16, 10 



The great loss of chlorine in the analysis makes in probable that the compound 

 contained some mixture of chloro-nitrato-nitrite. Still, no uncertainty as to the cor- 

 rectness of the formula appearing to exist, I did not repeat the experiment. 



9. Bichloro-silver-nitrite 2 Cl . Pt{ NH 3 ' 0(no n 2 " | Ag" 2 . When equal equivalents of the 



preceding compound and of nitrite of silver were dissolved together in boiling water, 

 no chloride of silver was precipitated, but on cooling the solution small yellowish- 

 white rhombic seales crystallised. The compound is easily soluble in hot water and 

 crystallises by the refrigeration of the solution. It does not contain water of crystallisation. 



Analysis: 



0,4520 gr. were melted with an excess of soda and this melted mäss exhausted 

 with water. From the solution was obtained 0,i83o gr. chloride of silver =0,0452 gr. 

 chlorine. The platinum and silver weighed 0,2fl'i0 gr., were heated with bisulphate of 

 potassium and the melted mäss boiled with water. The remaining platinum weighed 

 0,1280 gr., and from the solution 0,17 lo gr. chloride of silver and 0,oogo gr. metallic sil- 

 ver were obtained, or in total weight 0,1352 gr. silver, (calculated from the loss 0,1360 

 gr. silver). 



Comparing these with the calculated results we have: 



Theory Experiment 



Platinum 197,88 — 28, 15 28,32 



Silver 216,00—30,73 29,91 



Chlorine 70,92 — 10,09 10, oo 



Nitrogen 84,oo 



Hydrogen 6,00 



Oxygen 128, oo 



702,80 



