MOLECULAR CONDUCTIVITY OF AMIDOSULPHONIC ACID. 271 



which may be written as 



where ! '' v - • — = c, is the concentration of the ion, and ( 1 — — j— =c s 



is that of the undissociated salt. I have tested the above formulae 

 with sodium amidosulphonate ; the results which are tabulated below 

 are in agreement with both of them : 



o 



Sodium amidosulphonate, ^»=98.17. 



y =32 64 128 256 512 1024 



tj. v = 84.25 87.79 90.52 92.04 93.90 94.51 



k B = 1.00 1.03 1.05 0.96 1.01 0.85 



k„= 1.00 1.01 1.01 0.92 0.96 0.80. 



The values of h R and h n have been calculated according to Rudol phi's 

 and van't Hoff' s formulas, respectively, the value found for v=o2 liters 

 being-, in both cases, made equal to 1. The results are almost equally 

 constant up to f = 5 1 2 liters, but, in both cases, there is a greater 

 deviation for the last dilution, owing, no doubt, to a greater ex- 

 perimental error. 



's^ûr-; 



