258 THE ATOMIC WEIGHTS. 



the highest, 110.796, is calculated from the chlorine lost 

 upon igniting the palladiochloride. The same kind of 

 error which vitiates that result probably affects also these 

 data drawn from the palladiochloride. 



RHODIUM. 



Berzelius* determined the atomic weight of this metal 

 by the analysis of sodium and potassium rhodiochlorides, 

 NagRhClg, and KjRhClt;. The latter salt was dried by 

 heating in chlorine. The compounds were analyzed by re- 

 duction in hydrogen, after the usual manner. Reduced to 

 percentages the analyses come out as follows : 



III Na^RhCl^. 



Rh. sNaCl. Cly 



26.959 45-853 27.189 



27.229 45-301 27.470 



27.616 



Mean, 27.094 45-577 



27.425 



In K^RJiCly 



Rh. sKCl. Cly 



28.989 41-450 29.561 



From the analyses of the sodium salt we get the following 

 values for Rh : 



From per cent, of metal Rh = 104.507 



NaCl " =102.980 



" " CI3 " =105.696 



" ratio between Clj-and Rh " = 104.829 



" " NaCl " " = 104.093 



These are discordant figures, and indicate some doubt as 

 to purity of material. The last value is fairly good, how- 

 ever, and is confirmed by results from the potassium com- 

 pound : 



* Poggend. Annal., 13, 435. 1828. 



