Il E A C T 1 X V K L () C I 1' V A N ]) S O T, L' B I L 1 T V 



WILDER D. BANCROFT. 



ïlie influence of the solveut on réaction velocity lias hitherto been 

 considérée! chiefly as a matter of viscositv. The récent experiinents of 

 Buchbock hâve demonstrated that viscosit}' is one of the factors. It 

 cannot, liowever, be the sole factor ; otlierwise the order of the solvents 

 would be the same for ail reactions, which is well-known not to be the 

 case. The object of this paper is to call attention to another factor, the 

 solubility. 



Let us consider a nionomolecular réversible reaction in a so-called 

 indiffèrent solveut. We shall hâve equilibriuin when 



/•, c^ = h c, (Ij 



and the ex]jression for the reaction velocity at any moment will be 



- — ^r —^\ m 



dt~ A' A"-- ■ ^' 



In equatiou (1) >?;, and L, are the intégration constants in tlie expres- 

 sions for the chemical potentials in the solveut under consideratiou, 

 and are defined by the équations 



|i,= log/-, +log., (8) 



||,= log/-, +log^.. (4) 



