222 



HYDRATES IN AQUEOUS SOLUTION. 



Therefore, since there were 16 solutions (and 15 increments of concentration), 

 the average increase in absorption in the red was 10 A. U. Judged by the eye, 

 the extreme solutions of the series transmitted the yellow-green with the 

 same intensity. 



The solution of concentration 2.482 of aluminium chloride was compared 

 with some of the solutions which contained copper chloride and calcium 

 chloride. It was found that the solution having the concentration 3.788 of 

 calcium chloride had almost identically the same region of transmission as 

 the most concentrated solution of the set containing aluminium chloride. 



The cryoscopic data for the solutions which contained the chlorides of 

 aluminium and copper are given below in table 112. 



TABLE 112. 



TABLE 113. 



