IN WATER AND CERTAIN ORGANIC SOLVENTS. — ^DAVIS. 49 



Acetic Acid and Fuchsine. 



The acetic acid used was Baker's G. P. It was purified by 

 freezing and washing the crystals obtained thoroughly with 

 pure acid. /c--^ ^ 0.53 x 10~*^. 



In part of one experiment 'No. 2 at 25, the original acid 

 used was k^'' = 1.05 x 10~*^. 



V 



100 



200 



400 



800 



1600 



cc 



T = 25° 















'^l con 



6.75 



7.36 



8.25 



9.36 



10.99 





^2 corr 



6.80 



9.38 



10.88 









Mean X 



6.77 



8.37 



9.60 



9.30 



10.99 



12.5 



T=18° 















V,eo„ 



5.94 



6.16 



6.88 



[9.28] 



8.64 





^°2corr 



5.73 



6.14 



7.04 



8.00 







Mean X° 



5.83 



6.15 



6.96 



. 8.64 



8.64 





Conclusio7is. 



The main conclusion drawn from the preceding work, is 

 that the presence of the benzene nucleus in the solute does not 

 make any marked diiference in its behaviour as an electrolyte 

 from that of a solute which does not contain the nucleus. 



With reference to the first of the three laws enumerated 

 by Walden, that is the well known ISTernst-Thompson hypo- 

 thesis, the following table shows that the amount of dissocia- 

 tion of fuchsine, an aromatic solute, in a solvent stands in 

 some marked relation to the dielectric constant of the solvent. 

 This is exactly what Walden found in the case of tetra methyl 



Pkoc. & Tkans. N. S. Inst. Sci., Vol. XIII. Traxs. 4. 



