POTASSIUM OF POTASSIUM AS PLATINAC CHLORIDE 143 



Wt. of K.PtCle 0.6848 0.7890 0.3824 0.3758 0.3258 0.2584 



Wt. of Platinum 0.2696 0.3180 0.1560 0.1496 0.1302 0.1034 



Wt. Potassium 

 from wt. of Plat- 

 inum, (A) 0.1080 0.1274 0.0625 0.0599 0.0522 0.0414 



Original Wt. of 

 Potassium, (B) 0.1101 0.1269 0.0631 0.0604 0.0524 0.0416 



Ratio: B/A 1.018 0.996. 1.010 1.009 1.005 1.004 

 These results indicate that there is no loss in accuracy in 



the method which has been outlined. On the other hand, an 



appreciable saving of time and a greater ease of manipulation 



may be obtained by its use. 



The reaction which takes place on ignition of the potassium 



chlorplatinate is best represented by the equation: — 



K.PtClfi ^2 KCl + 2 CI, -f Pt. 



