of Acids by Carbohydrates. 



557 



Concentration experiments were made with hydrogen bromide 

 and cane sugar, a carbohydrate which readily blackens with this 

 acid, and the following results obtained: 



Weight of sugar, 10 gm. 



Concentration of acid added, 0"01484 gm. HBr. per c.c. 



Temperature 17° C. 



Time, 18"5 hours. 



