Studies on Solution. 



tivity of these salts being materially increased in concentrated solutions 

 on account of the greater fluidity of the solution. 



In order to complete the series of salts lowering the viscosity of these 

 solvents, caesium compounds remained to be measured. A supply of 

 csesium carbonate was finally obtained and converted into the nitrate 

 and chloride. The viscosities of these salts have already been measured 

 in water and in mixtures of water with methyl alcohol, ethyl alcohol, 

 and acetone. Tables 57 and 58 give similar results in mixtures of 

 glycerol and water. The viscosities were measured in the apparatus 

 described in the preceding chapter on formamid. 



TABLE 58. Viscosity ami Fluidity of Caesium Nitrate. 



It will be seen from tables 57 and 58 that csesium salts decrease the 

 viscosities of glycerol-water mixtures, the decrement being greater, 

 however, than in the case of rubidium salts. It should also be noted 

 that when salts of both metals increase the viscosity of a solvent, as in 

 the case of certain mixtures of water with acetone and the alcohols, 

 the caesium salts produce a smaller increment than rubidium salts. 



