PROPORTION OF INORGANIC RADICAL 



245 



For a 2.0 per cent solution of casein equation (vii) becomes: 

 X X 10 5 = 26,880 61 - 237,900 6 X 2 - 57.96. 



In the following table the experimental and calculated values 

 of X X 10 5 are compared: 



TABLE XXXI 



For a 3 per cent solution of casein equation (vii) becomes: 

 X X 10 5 = 26,880 bi - 158,600 6i 2 - 86.94. 



In the following table the experimental and calculated values 

 of X X 10 5 are compared: 



TABLE XXXII 



The same relation holds good for 1.5 per cent solutions of 

 casein in Ca(OH) 2 solutions of varying concentration (equivalent 

 concentration = 61) (17). 



To 50 cc. portions of a 3 per cent solution of casein in 0.024 

 N Ca(OH)2 (neutral to phenolphthalein) were added 0, 2, 4, 6, 

 or 12 cc. of 0.048 N Ca(OH) 2 and each mixture was diluted to 

 100 cc. Exactly similar solutions were made up, containing 

 however, no casein. The conductivities of each of these solu- 

 tions were then determined at 30 degrees. Applying equation 



