42 



HYDRATES IN AQUEOUS SOLUTION. 

 TABLE 17. SODIUM HYDROXIDE Continued. 



POTASSIUM CHLORIDE. 



The salt used was prepared by repeated crystallization from fairly pure 

 specimens. It was then dried for several days in an air-bath at 110 C. and 

 afterwards preserved in a desiccator over calcium chloride until it was used. 

 From the mother-solution prepared by direct weighing, the lesser concentra- 

 tions were obtained by dilution. 



