204 



Dr. G. Senter. 



[June 2, 



I. Initial Concentration of H. 2 2 in the Eeaction Mixture 



approx. ?i/200. 



investigated. Eesults for the first three acids have been given above ; 

 the following are the results obtained for the other three, with the 

 numbers for HC1, obtained at the same time, for the sake of com- 

 parison : 



Table II. 



Concentration of acid. Concentration of H-ions. 



Acid, hydrochloric, w/10,000 Ti/10,000 



Ti/20,000 



benzoic, 7i/4,000 



%/10,000 



ft/25,000 



succinic, n/l 0,000 



Ti/25,000 



acetic, 7i/l,333 



7i/2,666 



Control experiment 



Ti/20,000 

 Ti/11,000 

 71/19,000 

 Ti/37,000 

 71/18,200 

 Ti/36,000 

 Ti/10,000 

 71/13,000 

 



From the tables, it will be seen that, while HC1 and H 2 S0 4 , which 

 arc completely dissociated under the conditions of experiment, give 



Constants. 

 0-0015 

 0-0034 

 0-0019 

 0-0033 

 0-0078 

 0-0029 

 0-0070 

 0-0041 

 0-0049 

 0-0300 



