Question

Se supun saponificarii 8.90 g tristearina cu solutie de KOH de conc 40 %. a) Calculeaza masa de sapun obtinuta stiind ca toata cant a reactionat; b) Hidroxidul de K s-a introdus in exces de 10 %. Calculeaza masa de solutie de KOH introdus in procesul de saponificare

Answer 1

890g..............3*56g.......3*322g
Tristearina + 3KOH -> 3CH3-(CH2)16-COOK + glicerina
8,9g...............a=1,68g....b=9,66g
1,68g KOH...........100%
cg KOH................110%
c=1,68*110/100=1,848g KOH
40/100=1,848/ms => ms=1,848*100/40=4,62g solutie de KOH