198 



ELECTRIFICATION OF WATER 



monovalent anion like NaNOa or Mg(N03)2 (Fig. 15). The Mg ion 

 attracts negatively charged water more powerfully than the NaNOa 

 and hence the depressing effect of Mg(N03)2 is smaller than the de- 

 pressing effect of NaNOa. Fig. 16 shows that the depressing effect 

 of the addition of H2SO4 upon m/512 AI2CI6 is greater than the addition 

 of HNO3, both acids acting similarly to the potassium salts with the 

 same anion. 





o 



o 



to 





200 



180 



160 



140 



120 



100 



80 



60 



40 



20 



jliiJiririnillinnriMrii^f 



8192 40% 2048 1024 512 256 128 64 32 16 8 4 2 



Concentration 



Fig. 16. Curves showing that the depressing effect of HNO3 and H2SO4 is 

 similar to the depressing effect of NaNOa and Na2S04 when added to m/512 

 AI2CI6. 



All these facts support our assumption that the drop in the curves 

 representing the influence of the concentration of the electrolyte upon 

 the rate of diffusion of water through collodion membranes is due to 

 the fact that beyond a certain concentration the repelling action of 

 the ion with the same sign of charge as that of water increases more 

 rapidly with a further increase in concentration than the attractive 

 action of the ion with the opposite charge upon the water. 



