94 



TABLE Va. Behaviour of betain in alkalic solution. 



B 



D 



40 cm3 of a solution containing + S^/o glucose 



Quantity of betain-hydro- 

 chloric acid added 



Number of cm3 1,06 Normal 

 NaOH-solution 



499milligr. 







2,5 



Filled up to 50 cm3 and placed in 

 thermostat with watermantle (temperature 33°) 



499 milligram betain-hydrochloric acid correspond with 



499 

 153,5 



almost 3,3 cm', normal HCl. If in alkalic medium betain behaves 

 as a neutral compound, the action of the added 5 cm^ 1,06 N. 

 NaOH^= 5,3 Q.m\ N. NaOH must be diminished bv that of 

 3,3 cm\; then 5,3—3,3 = 2 cm\ N. NaOH remains. From the 

 experiments it follows indeed that 499 milligrams of betain-hydro- 

 chloric acid and 5 cm". 1,06 N. NaOH act together as something 

 less than 2,5 cm\ 1,06 N. NaOH. 



Whilst in alkalic solution betain behaves neutral, in acidic solution 

 it acts like one-acidic alkali. 



From this results that the betain-hjdrochloric acid-complex behaves 

 as practically neutral. 



Hence the inversion of sucrose by hydrochloric acid is accelerated 

 but little by belain-hydrochloric acid. 



