IN ETHYL ALCOHOL. 



73 



with such weak acids. Even the strongest acids with which we worked 

 do not give a molecular conductivity greater than unity. 



Titrations of the acids against the standard alkali were made simul- 

 taneously with the conductivity measurements at every temperature. 

 At first the alcoholic solution of the acid was not kept at a constant 

 temperature, but it was soon found that in order to obtain comparable 

 results, and to avoid the considerable fluctuations of laboratory tem- 

 perature, it was necessary to have all the solutions continuously at one 

 temperature, preferably at 25. 



RESULTS. 



In the following tables of conductivity, V m signifies the volume for 

 which the solutions were made up ; V c is the corrected volume. The 

 corrections applied were both for expansion or contraction of the alco- 

 hol, and for change in the concentration of the acid due to formation 

 of ester. Molecular conductivity was calculated in the usual manner. 

 Temperature coefficients and percentage temperature coefficients are 

 expressed for 10 degrees. The specific conductivities of the alcohol as 

 given are all multiplied by 10 3 . They are really of the magnitude 10~ 7 . 



TABLE 23. Molecular conductivities, temperature coefficients, etc.. of certain acids. 



