40 P. T. CLEVE, 



When the bromonitrite was treated with sulphite of sodium a white compound, 

 cristallising in microscopical quadratic scales, was obtained. Its formula is probably 



{Af TT Rv 

 nr 3 o so ONa ^ut tne nuraDers found by the analysis do not agree so well with 



those calculated as to warrant their publication. 



12. Sulphate S0 2 . 2 . Pt{ NH 3 ' jS0 2 +3H 2 0. Was prepared by double decomposi- 



tion between the chloride of platinammine and sulphate of silver. To the solution, 

 separated from the chloride of silver, some sulphuric acid was added, and by evapo- 

 ration a yellowish white crystalline mäss was obtained, which was dried at 100°. The 

 compound is easily soluble in water, but löses sulphuric acid by solution and yields 

 the basic sulphate (N:o 13), 



Analysis: the sulphate dried över sulphuric acid. 



1. 0,5420 gr. gave 0,2220 gr. platinum and 0,5400 gr. sulphate of barium =0,0/42 gr. 

 sulphur. 



2. 0,4420 gr. gave 0,1835 gr. platinum and 0,4480 gr. sulphate of barium =0,06ir> 

 sulphur. 



The formula requires: 



Theory Experiment 



1 2 



Platinum 197,88 — 41,44 40,96 41, 51 



Sulphur 64,oo — 13,39 13,69 13,91 



Nitrogen 28,oo 



Hydrogen 12,oo 



Oxygen 176,oo 



477,88 



The sulphate heated in the air-bath at 100° löses 5,24 p. et. water, which cor- 

 respond to 3 mol. ELO for 2 mol. of the sulphate (theory 5,34 p. et.). 



By dissolving the hydrate of the basis in sulphuric acid Mr. Geriiardt x ) obtained 

 the anhydrous sulphate containing 46,oo p. et. platinum. 



13. Sulphate basic 2HO . Pt^ NH 3 }S0 2 +H,0. Was obtained by double decomposi- 



tion between the chloride of platinammine and sulphate of silver. The solution depo- 

 sits by concentration härd, straw-coloured crusts, which are composed of conglomerated 

 microscopical needles. The sulphate is only with difficulty soluble in water. 



The compound dried över sulphuric acid did not change its weight by heating 

 to 100° in the air-bath 



Analysis: 



1. 0,4182 gr. gave 0,2167 gr. platinum and 0,2690 gr. sulphate of barium —0,0369 gr. 

 sulphur. 



2. 0,2690 gr. gave 0,1385 gr. platinum and 0,1660 gr. sulphate of barium =0,0228 gr. 

 sulphur. 



') Gerhardt 1. c. p. 311. 



