( fi7 ) 



niodilieations of the same salt were successfnlly isolaled iii a solid 

 condition. 



In the case of chromic chloride two compounds Avere found to 

 exist at the ordinary temperature with 6 H^O. In connection whh 

 his theory on complex compounds, Wkrnkr proposed the following 

 structural formulae: 



Cr ^^^J^ CI . 2 H,0. 



2 ~ 4/ J 



The first salt is violet, the second one green. In the first salt the 

 three chlorine atoms should be capable of ionisation ; in the latter 

 only one. If only these are precipitable by silver solutions ^) the 

 amount of each salt in a mixed solution may thus be quantitatively 

 determined. 



First of all measurements were made at 25° as to the velocity of 

 the transformation of solutions with dilferent contents of chi'innic 

 chloride and as to the final condition which thev attain. 



The result of these last investigations is indicated in the Figure 

 by the line AGH. 



In this figure A stands for the solvent H^O, B for the green 



1) We foinid this not to bo al)Soliiloly conect but llic precipilahle clilorino could 

 n anv case be used as a measure tor llie two salts. 



