50 CONDUCTIVITY OF ROSANILINE HYDROCHLORIDE 



ammonium iodide an aliphatic solute, as the following com- 

 parative table shows: 



Dielectric Constant Dissociation at v 100 

 Solvent Fuchsine N (C H \ I 



o 4 



Water 81.7 95^ 



Methyl Alcohol 32.5 34.8 84< 



Ethyl Alcohol 21.7 27.4 810 



Acetic Acid 6.46 53$ 



The other empirical relations which Walden himself has 

 worked out are those: 



(2) Between the temperature coefficient of conductivity 



and the conductivity of infinite dilution. 1 



(3) Between the dielectric constants of the solvents and 

 the molecular dilutions at which they show equal 



dissociation of the same solute. 



I have been unable to find these relations for the con- 

 ductivity of rosaniline hydrochloride in the four solvents used, 

 and indeed it would not be permissible to draw any conclusion 

 with such a limited number of solvents. 



The following table shows the general similarity in the con- 

 ductivity of solutions of the aliphatic and aromatic solutes. 



Solvent Fuchsine N (C H 3 ) 4 I Fuchsine N(C H g > 4 I 



A 2? Co-ss 



1. It is worthy of note that in calculating the temperature coefficient between 15 

 and 85 Walden does not use the temperature coefficient c as he has previously defined it 



c = 



This, of course, does not amount to the same thing. If the temperature coefficient of 

 his acetic-acid solutions is calculated as first defined, it is found to be above .36 instead 

 of .056 and this value when multiplied by the conductivity at infinite dilution 5.6 give* 

 a constant 2.0 which is near the value of 1.3 required according to his empirical law. 



