Question

Deci enuntul suna cam asa:
Sa se determine masa de solutie de substanta C3H7OH, de concentratie 30% care se poate obtine din 44,8L de substanta C3H6, considerand ca C3H6+H2O - C3H7OH.

Answer 1

C3H6 + H2O --> C3H7OH
44.8/22.4=2 moli C3H6
1 mol C3H6 ..... 1 mol alcool
2 moli         .....     x = 2 moli alcooli
M=3*12+7*1+16+1=36+7+17=60
m=2*60= 120 g alcool (md)
c=md*100/ms => ms=md*100/c = 120*100/30=400 g solutie C3H7OH