^[acleOD. — Baic of O.iiddfion of Ar< iohUh ijdc to Atut'ir Acid. 51 



The fact that the rise in the value of K' is not regular can be accounted 

 for by the extreme difficulty of having the conditions so exactly the same 

 as not to cause some slight variation in the speed. 



Effect of Large Quantities of Nitrogen on the Reaction. 

 The following experiments may be quoted to show that the presence of 

 nitrogen, even in large quantities, has very little effect on the reaction : — 



Partial pressure of nitrogen = 129 mm. 

 Partial pressure of acetic acid = 12 mm. 



Time 

 in Minutes. 



P-2- 



V 



Temperature. 



K' 





 73 

 158 

 188 

 223 

 283 



304 



268-6 

 237-3 



227-4 



218 



208 



286 



267-4 



251-7 



246-6 



242 



237 



1025 



984 

 937 

 922 

 908 

 893 



24-8° C. 

 24-8° C. 

 24-8° C. 

 24-8° C. 

 24-8° C. 

 24-8° C. 



2-4 

 2-0 

 2-1 

 1-9 

 1-7 



Partial pressure of nitrogen = 435 mm. 

 Partial pressure of acetic acid = 15 mm. 



