588 



nilic acid behaves neutral and in alkalic media as monobasic acid. 

 The referential experiments are united in table III« and III^. 



fD X2 



C 



O a 



02 «D 



PP D. 



fD • 



-n 



- > 



3- " 



t/) 3 



SU w 



^ rt- 



^ 3- 



^ fD 



&1 =i. 

 o — 



i. 3 



Diluted to 100 cm.3 and placed in 

 thermostat with watermantle. (Temp. 33°— 34°). 



+ 



+ 



+ + 



to 



+ 

 to 



temperature of the polarisation 

 liquid was 26°.5 





en 



w 



+ 



to 



+ 



temperature of the polarisation 

 liquid was 28° 



Number 



> 



1+ 



3* 

 O 



o 



— N 



From the experiments 6 and 7 (I1I«) we see that after ± 6 hours 

 polarisation lias been lowered to lespectivelj + 3,6 and -|- 3,7. 

 This number is almost, equal to the polarisation of N'. 4 after the 

 same lime. From which it may be concluded that 1 milligram- 



