Question

Sa se calculeze masa de solutie de glucoza concentratie 18% , care reiese din reactia de oxidare a glucozei cu reactiv tollens , stiind ca reiese 2.5 moli de acid gluconic .

Answer 1

        Y                                     2,5

C6H12O6+2[Ag(NH3)2]→C6H12O7+2Ag + 4NH3+H2O

  180                                  1

 

Y=2,5X180

c=mdX100/ms

18=2,5x180/ms

ms=2,5x180x100/18

ms=2500g solutie de glucoza

Answer 2

Glucoza + r. Tollens ⇒ acid gluconic 
n gl = n acid = 2,5 moli 
solutia de glucoza : md = 2,5·180 = 450g      c = 18% ⇒ ms = 2,5·180·100/18 
ms = 2500g