90 ELECTRICAL CONDUCTIVITIES, ETC. 



Conductivities of Sodium Salts of Certain Acids Continued. 



Sodium. v 



m-Aminobenzoate 2048 



/>-Aminobenzoate 2048 



Metanilate 2048 



[1024 

 Sulphanilate -12048 



[4096 

 p - Sulphamido -bcn- 



zoate 2048 



(1024 



o-Toluate 2048 



4096 



1024 



m-Toluate -12048 



14096 



[1024 

 p-Toluate J 2048 



(4096 



(1024 

 Cinnamate -1 2048 



[4096 



Hydrocinnainate 2048 



Anisate 2048 



Vanillate 2048 



Naphthionate 2048 



Mandelate 2048 



Coumarate 2048 



M f M r 15 M,,25 M35 i M r 50 M,65 



Kf= 



28.63 

 38.20 



38.47 

 39.52 

 39.36 



39 30 

 37.82 

 38.26 

 38.18 

 38.02 

 38.25 

 38.28 

 38.02 

 38.25 

 38.28 

 27.15 

 37.69 

 37.60 

 38.49 

 39.36 

 38.98 

 39.54 

 38.25 

 38.50 



60 



59 

 60 

 60 

 57 



59 



23 



95 

 12 



08 

 28 



97 



69.36 

 75.26 

 77.69 

 76.20 

 77.69 

 77.70 



76.57 

 74.04 

 70.48 

 74.92 

 74.33 

 75.63 

 75.59 

 74.90 

 75.44 

 75.28 

 72.86 

 74.49 

 74.41 

 76.54 

 76.96 

 76.64 

 79.05 

 76.00 

 76 56 



89.49 

 92.51 

 95.60 

 93.81 

 96.05 

 95.85 



94.00 

 91.87 

 92.68 

 92.58 

 92.16 

 92.88 

 92.79 

 91.93 

 92.40 

 92.29 

 89.91 

 92.06 

 91.95 

 93.21 

 95.04 

 93.26 

 97.10 

 93.20 

 93.81 



! 38.20+1 308/+0.00696/ 2 



125.0 160.2 



125.0 160.2 39 .52+1 .307/+0.00879/ 2 



123.3 154 4 39.30 + 1.31/+0.0072/ 2 



125.09 156.8 



125.05 162.7 



124.12 159.65 



125.1 158.7 37. 09+1. 271 /+0 00811 H 2 



122.50 155.83 

 125.06 158.68 



123.00 156.02 

 130.74 160.78 

 123 00 168.37 



10 12 



16 8 20 22 24 



Number of atoms 



Fig. 5. 



26 



28 



30 



The ju w for a number of the acids used in this work could not be determined as 

 above described. These acids are di- or polybasic, and their sodium salts do not 

 give a Moo value even at a dilution of w/4096. 



The method first used in this laboratory by Wightman for determining the y. x 

 for such acids is as follows: A curve was plotted in which the ordinates are the 

 values of ju, for a number of organic acids, and the abscissas are the number of 



