282 



COLLOIDS AND ELECTROLYTES 



diffusion of water into a m/256 solution of Na2S04 in the same way 

 as it depresses the initial rate of diffusion of water into a solution of 

 Na gelatinate. 



360 



340 



3E0 



300 



280 



260 



240 



220 



200 



160 



160 



140 



120 



100 



80 



60 



40 



20 





to 

 CO 



Q- 

 u 

 o 

 B 



m 

 O 



onnnnnnn 



4000 ZOOO 1000 500 250 125 62 



Concentration of alkali added 



Fig. 6. Depressing effect of the addition of alkali to 1 per cent Na gelatinate 

 of pH = 8.4 upon osmotic pressure of gelatin solution. Ca(0H)2 depresses more 

 than KOH. The effect is similar to that of addition of neutral salt. 



