ON AMMONIACAL PLATINUM BASES. 73 



b. 0,3380 gr. gave 34,5 C. C. nitrogen (temp. of water 14°. Bar. 772 in. ni. t. 15 D ) 

 =0,0410 gr. nitrogen. 



c. 0,4410 gr. gave 0,1750 gr. platinum and 0,2670 gr. chloride of silver =0,0653 gr. 

 chlorine. 



The forniula requires: 



Theory Experiment 



a b c 



Platinum 197,88 — 40,48 39,85 39,68 



Chlorine 70,92 — 14,51 14,81 



Nitrogen 56,oo — 11,46 12,16 — 



Carbon 144,00 



Hydrogen ... 20,oo 

 488.80 



2. Chloroplatinite, RCL^CLPt, is thrown down under the form of a rose-colo- 

 ured voluminous precipitate of fine microscopical needles, by mixing together the Solu- 

 tions of the chloride (N:o 1) and chloroplatinite of potassium. 



Analysis: 



0,2885 gr. (dried at 100°) gave 0, 1 49ö gr. platinum and 0,2160 gr. chloride of silver 

 =0,0534 gr. chlorine. 



The forniula requires: 



Theory Experiment 



Platinum 395,76 — 52,24 51,82 



Chlorine 141,84—18,72 18,51 



Nitrogen 56,oo 



Hydrogen 20,oo 



Carbon 144,oo 



757,60 



3. Nitrate, RO,. . 2NO L -, was prepared by adding aniline to a warm solution of 

 the nitrate of platosemidiammine. On cooling the liquid the nitrate Avas obtained in 

 glittering rhombic scales, coloured rose-red by a small quantity of a resinous matter. 

 The nitrate is so easily soluble in hot water, that the solution turns stiff on cooling. 

 The nitrate subjected to the analysis was twice crystallised. 



Analysis : 



a. 0,2450 gr. gave 0,0880 gr. platinum. 



b. 0,3655 gr. gave 48,5 C. C. nitrogen (temp. of water 16° Bar. 772 m.m. =U,os72 

 gr. nitrogen. 



K. Vet. Aka.l. Handl I!. In. \:,. '.'. 



10 



