SILVER, POTASSIUM, ETC. 51 



Mean, 45.0705, d= .0029. 



The ratio between silver and sodium chloride has been fixed by Pe- 

 louze, Dumas, and Stas. Pelouze * dissolved a weighed quantity of silver 

 in nitric acid, and then titrated with sodium chloride. Equivalent to 

 100 parts of silver he found of chloride : 



54.158 

 54.125 

 54.139 



Mean, 54.141, .0063 



By Dumas f we have seven experiments, with results as follows. The 

 third column gives the ratio between 100 of silver and NaCl : 



2.0535 grm. NaCl = 3-788 grm. Ag. 54-2H 



2.169 4.0095 " 54.097 



4-3554 8.0425 " 54.155 



6.509 12.0140 " 54.178 



6.413 11-8375 " 54.175 



2.1746 4.012 " 54.202 



5- "3 " 9-434 " 54.187 



Mean, 54.172, .0096 



Stas,J applying the method used in establishing the similar ratio for 

 potassium chloride, and working with salt from six different sources, 

 found of sodium chloride equivalent to 100 parts of silver : 



54.2093 

 54.2088 

 54.2070 

 54-2070 

 54.2070 

 54.2060 

 54.2076 

 54.2081 

 54-2083 

 54.2089 



Mean, 54.2078, .0002 



As in the case of the corresponding ratio for potassium chloride, these 

 data needed to be checked by others which took into account the solu- 



*Cotnpt. Rend., 20, 1047. 1845. 



t Ann. Chem. Pharm.. 113. 31. 1860. 



J Aronstein's translation, p. 274. 



