150 



Conductivities and Viscosities in Pure and in Mixed Solvents. 



SODIUM BROMATE. 



This salt was twice recrystallized and then was dried at 100 for 

 several hours; after cooling over phosphorus pentoxide, the required 

 amount was weighed and dissolved. (See table 77.) 



TABLE 77. Sodium bromate. 



SODIUM SULPHOCYANATE. 



The original solution of this salt was standardized by treating a meas- 

 ured volume with a slight excess of an acidified solution of silver nitrate. 

 The precipitate of silver sulphocyanate was filtered into a Gooch cru- 

 cible, washed and weighed. Duplicate determinations were made as 

 in the case of all solutions standardized by analysis. (See table 78.) 



TABLE 78. Sodium sulphocyanate. 



SODIUM THIOSULPHATE. 



Iodine which had been resublimed in the presence of potassium iodide 

 was weighed into small flasks with tightly fitting glass stoppers. About 

 2 gm. of potassium iodide and 0.5 c.c. of water had been previously 

 weighed into these flasks. After the weight of the added iodine was 

 determined, the flasks were opened in Erlenmeyer flasks containing 20 

 c.c. of water and potassium iodide. This solution was titrated with the 

 thiosulphate. Starch solution was used as an indicator. (See table 79.) 



