SULPHURIC ACID. 

 TABLE 76. NITRIC ACID Continued. 



97 



SULPHURIC ACID. 



The approximate composition of the hydrates formed by sulphuric acid 

 between the concentrations, normal and 4.37 normal, was calculated by Jones 

 and Getman.* It was desirable to learn what order of hydration existed 

 in both very concentrated and very dilute solutions of sulphuric acid. The 

 freezing-points of its solutions were measured up to a concentration of 5 N 

 by means of an alcohol thermometer, using solid carbon dioxide and alcohol 

 or ether as the refrigerating agents. The results are given in table 77 and in 

 fig. 52. In dilute solutions no water is held in combination. From about 

 0.5 to 5 N the amount of combined water increases with the concentration. 



TABLE 77. SULPHURIC ACID. 



*Ztschr. phys. Chem., 49, 446 (1904). 



