VELOCITY OF REACTIONS 



27 



tion process went on. Now it was known from 

 experiments of different authors that the reaction 

 of the solution becomes more and more basic 

 with time during the coagulation, and it was also 

 known that in many cases the velocity of reaction 



20 



18 



16 



£»I4 



c 



o |2 

 o 



10 



0-8 



8 



10 



Time in minutes — ► 

 Fig. 4. 



depends in a high degree on the acidity or alkalinity 

 of the solution. Therefore instead of asserting that 

 the reaction does not follow the laws known from 

 general chemistry, as has been done in many similar 

 cases before, Miss Chick and Dr. Martin tried 

 if the rate of coagulation was constant at a constant 

 degree of acidity. This was attained by adding 



