THE CONDUCTANCE OF SOLUTIONS-VISCOSITIES 121 



taining the non-electrolyte and F is the fluidity of the solution. The 

 smaller the conductance change of the electrolyte for a given fluidity 

 change, the smaller is the value of the exponent p. 



In Table XLIII are given values of the exponent p for aqueous 

 solutions of a number of electrolytes in the presence of non-electrolytes. 



TABLE XLIII. 



CHANGE OF CONDUCTANCE OF ELECTROLYTES DUE TO ADDED 

 NON-ELECTROLYTES. 



Non- Raf- Gly- Ace- Methyl 



Electrolyte Sucrosef finose* cerolf tone$ Ureaf Alcohol* 



Mol. Wt 342.1 594.4 92 58 60 32 



p for KC1 0.66 0.675 0.83 0.93 0.95 1.2 



t 20 25 20 25 25 25 



Methyl Methyl 

 Non-Electrolyte Sucrosef Raffinose* Raffinose* Alcohol* Alcohol* 



Electrolyte HC1 CsCl LiCl CsCl LiCl 



p 0.55 0.676 0.669 0.8 1.1 



* 25 25 25 25 



* Clark, Thesis, Univ. of 111. (1915). See also, Washburn, "Principles of Physical 

 Chemistry," 2 Ed., p. 260. 



t 5holm, Finskct Vetenslcap. Soc. Forhandl. 55, A No. 5, p. 75 (1913) ; Washburn, 

 loc. cit. 



t Ryerson, Thesis, Univ. of 111. (1915). 



Green, J. Chem. Soc, 93, 2049 (1908). 



It will be seen from the table that, in general, the higher the molecu- 

 lar weight of the added non-electrolyte, the smaller is the value of 

 the exponent p. This is most clearly shown in the case of potassium 

 chloride, for which electrolyte the data are more extensive than for 

 others. The exponent in the presence of sucrose and raffinose is in the 

 neighborhood of 0.67, while in the presence of urea it is 0.95 and in the 

 presence of methyl alcohol 1.2. The molecular weight of the added elec- 

 trolyte is thus a governing factor in determining the manner in which 

 the conductance of an ion varies due to viscosity change. That some 

 transpositions in the order of the exponent and in that of the molecular 

 weight of the added non-electrolyte will occur is to be expected, since 

 specific influences may make themselves felt. It is noticeable that in 

 the case of methyl alcohol the exponent has a value greater than unity. 



