IN ETHYL ALCOHOL. 



79 



the conductivity of some salts of the acids, as well as of hydrochloric 

 acid and the chlorides corresponding to these salts. 



The increase in conductivity with increase in volume is shown 

 graphically in figures 25 and 26. The increase in conductivity with 

 rise in temperature can be seen from figs. 27 and 28. In the latter case 

 the curves have very much the appearance of those in aqueous solu- 

 tions. This suggests that perhaps the increase in molecular conduc- 

 tivity in alcohol with rise in temperature is a parabolic function, as 

 in aqueous solutions, and that the Euler equation, /jL v = no+at bt 2 , 

 applies to both. 



0.20 



45 



O.40 



035 



0.30 



I 0.25 

 c 

 o 

 o 



0.20 



0.15 



0.10 



0.05 



0.0 



0.15 



-o 

 ] 0.10 



D 

 O 



.5! 



0.05 



(5 35 



Temperature 



FIG. 27. Malonic acid. 



0.0 



Temperature 

 FIG. 28. p-Chlorobenzoic acid. 



This will be tested in the later work by determining the conduc- 

 tivities of some of the acids at temperatures other than the three 

 already named, and comparing the results obtained. The most striking 

 feature of the conductivities of the same acids in water is their very 

 small value. When we consider the relative powers of alcohol and 

 water to dissociate salts, the above fact does not at present seem to 

 admit of any very satisfactory explanation. Alcohol has from one- 

 fourth to one-fifth the dissociating power of water, as shown by their 

 dissociation of salts. With the organic acids the conductivities in 

 alcohol are often several hundred times smaller than in water. It is 

 hoped that the further work which is now in progress in this laboratory 

 on this problem may throw some light on this relation. 



