56 P. T. CLEVE, 



2. a. 0,2740 gr. gave 0,2000 gr. metallic platinum and 0,isoo gr. chloride of silver 

 = 0,0386 gr. chlorine. 



b. 0,3000 gr. gave 29 C. C. nitrogen (temp. of the water 15° Bar. 757 m. m. t. 15°) 

 = 0,0336 gr. nitrogen. 



These results calculated in p.ct. are as follow: 



1 2 



a b 



Platinum 73,98 72,99 — 



Chlorine 13,58 14,09 — 



Nitrogen — — 9,34 



rci 



Ine iormula rt,| NH NH requires: 

 Ici' ' 



Platinum 395,76 74,30 



Chlorine 70,92 13,3! 



Nitrogen 56,oo 10,51 



Hydrogen 10, oo 1,88 



532,68 100,oo 



The found and calculated nurabers do not quite agree, but a better result is 

 not to be expected from the analysis of a matter, the purity of which it is impossible 

 to prove. The compound may contain one mol. water H^O more than the formula 

 indicates. 



For the purpose of ascertaining, if the black chloride was saturated, or a basic 

 salt, it was treated with hydrochloric acid and analysed, when 66,63 p.ct platinum and 

 18,62 p.ct. chlorine were obtained; but, on boiling the product with water, some chloride 

 of platosemidiammine was extracted. This experiment shows clearly that hydrochloric 

 acid destroys the compound at the same time as it is added to the molecules of amid. 



Cl 



p, M ♦ 2H Cl = 2PC- 



»Cl 



ici 



(OH 



(OH 



2. Product of the hydrate: Pt_A NH 3 ~ NH 2 + H 2 and nitro-muriatic acid. If the hy- 



Ioh 

 drate is heated with a mixture of hydrochloric and nitric acid a violent reaction takes 

 place and red vapours are evolved. The product of this reaction is a yellow powder, 

 which does not present a crystalline formation. By analysing this product, as taken 

 from several different preparations, I obtained the following numbers: 

 i 



1 



Platinum 60,oo 



Chlorine 27,88 



2 



2 



4 



59,02 



58,32 



58,29 



27,92 



28,51 



27,41 



