BULLETIN OF THE UNIVERSITY OF WISCONSIN 

 SCIENCE SERIES, VOL. 1, No. 1, PP. 1-33, DECEMBER, 1894 



ON THE SPEED OF THE LIBERATION OF IODINE 



IN MIXED SOLUTIONS OF POTASSIUM 



CHLORATE, POTASSIUM IODIDE, 



AND HYDROCHLORIC ACID. 



BY HERMAN SCHLUNDT, 1 



Assistant in Chemistry. 



A systematic study of the conditions of experimentation 

 that determine the progress of a reaction has until of late 

 years received very little attention. During the last two 

 decades, the speed of various reactions as dependent upon 

 modifying influences has been specially investigated, 

 and to-day the subject of chemical dynamics furnishes 

 many interesting problems for investigation. The present 

 work has been undertaken with the view of collecting data 

 for the solving of some of these problems. 



Burchard 2 studied the speed of the liberation of iodine 

 in mixtures of hydriodic and iodic acids in very dilute so- 

 lutions. Similarly he investigated mixtures of hydriodic 

 acid with bromic or chloric acids. Mixtures of the salts of 

 hydriodic and chloric acids with hydrochloric acid, however, 

 have never to my knowledge been investigated in this way. 

 It is the purpose of this paper to study the speed of the 

 liberation of iodine in such mixtures as are influenced: 

 first, by temperature; second, by degree of concentration; 

 third, by the presence of an excess of one or more of the 

 components; and fourth, by the addition of an excess of 

 other acids. 



1 A thesis submitted for the degree of Bachelor of Science in the General Science Course, 

 University of Wisconsin, June, 1894. 



2 Ueber die Oxydation des Jodwasserstoff as durch die Sauerstoffsaiiren der Salzbilder, 

 Zeitschr. physik. Chem., 2; p. 796. (1888.) 



