212 



THE ATOMIC WEIGHTS. 



Analyst B. 



2.8530 grm. V0Cl3=: 5.2853 grm. Ag. 

 2.1252 " 3.9535 



1.4248 " 2.6642 " 



53-980 

 53-755 

 53-479 



Mean, 53.586, ± .039 



The gravimetric series, of course, fixes the ratio between VOCI3 and 

 AgCl. If we put the latter at 100 parts, the proportion of VOCI3 is as 

 given in the third column : 



Analyst A. 



1. 8521 grm. VOCI3 gave 4-5932 gnu. AgCl. 



Analyst B. 



2.1936 grm. VOCIg gave 5.4039 grm. AgCl. 

 2.5054 " 6.2118 " 



40.323 

 40.531 

 40.537 

 40.337 

 40.399 

 40.174 



40.391 

 40.333 



Mean, 40.378, ± .028 



These two series give us two values for the molecular weight of VOClg : 



From volumetric series. 

 From gravimetric series 



V0Cl3= 172.185, 

 " =172.358, 



.1254 

 .1196 



General mean VOCI3 = 172.277, rb .0866 



Hence V = 50.881, ± .0877. 



Combining the two values for V, we have : 



From VOCI3 V = 50. 



From V,0, 



i .0877 

 50.993, ± -0219 



General mean V ^ 50.986, ± .0212 



If = 16, V = 51.376. These values are calculated with = 15.879, 

 ± .0003; CI = 35.179, ± .0048; Ag = 107.108, ± .0031, and AgCl = 

 142.287, ± .0037. 



