38 



Studies on Solution. 



The pure-alcohol solution was a deep blue, which changed with the 

 addition of water through a series of purple shades, until the color 

 became the pink hue characteristic of the aqueous cobalt-chloride 

 solutions. This change was nearly complete for c 2 = 6.94. These 

 mixtures decomposed upon standing, yielding a precipitate in a manner 

 similar to the pure-water solutions. 



.0500 



<x-ct n 



700 



0500 



d'(t 



800 900 1.000 /uju, 1.100 / 



It 



555 



18.0.-. 



CoCl 2 inCH 3 OH 



700 



800 



900 



1.000 



JJOO/i/t 



Curves showing the Differences in Absorption between Solvent and Solutions for 

 Cobalt Chloride in Mixtures of the Alcohols with Water. 



