PALLADIUM. 257 



In a later paper* Berzeliiis published two analj'ses of 

 potassium palladiochloride, K^PdCl^. The salt was decom- 

 posed by ignition in hydrogen, as was the case with the 

 double chlorides of potassium with platinum, osmium, and 

 iridium. Reducing his results to percentages, we get the 

 following composition for the substance in question : 



Pd. 2KCI. C4. 



32.726 46.044 21.229 



32.655 45-741 21.604 



Mean, 32.690 45.892 21.416 



From these percentages, calculating directly, very dis- 

 cordant results are obtained : 



From percentage of metal Pd = 106.612 



" " KCl " =r 104.674 



" " Clj, (loss) " = 110.796 



Obviously, the only way to get satisfactory figures is to 

 calculate from the ratio between the Pd and 2KC1. Doing 

 this, we get, Pd = 105.737 ; or, if O = 16, Pd = 105.981. 



This last value varies so slightly from the even numl^er 

 106 that the latter may be safel}' used for all purposes of 

 chemical calculation. 



The determination made by Quintus Icilius* need be 

 given only for the sake of completeness. He ignited potas- 

 sium palladichloride in hydrogen, and found the following 

 amounts of residue. His weights are here recalculated into 



percentages : 



64.708 

 64.965 

 64.781 



Mean, 64.818 



From this mean, Pd = 111.879. Upon looking at the 

 values deduced from Berzeiius' figures, it Vv'ill be seen that 



* Poggend. Aimal., 13, 454. 1828. 



f " Die Atomgcwichte vom Pd, K, CI, Ag, C, und II, nach der Methode der 

 kleinsten Quadrate berechnet." Inaug. Diss. Gottingeii, 1S47. Contains no 

 other original analyses. 



17 



