Răspuns:
niu,SO2=V/Vm= 4,48/22,4 mol=0,2mol
1mol............2mol...................1mol.....1.mol...2mol
Zn + 2H2SO4 ---> ZnSo4 + SO2 + 2H2O
x.................y.............................z..........0,2mol......t
x= niu=0,2mol Zn-> m= niuxM= 0,2x65g=13g-> rezulta ca se consuma toata masa de zinc
y=niu=0,4molH2SO4 -> m= niuxM=0,4X98g=39,2g
z=0,2molZnSO4---> m= niuxM=0,2x161g=32,2g
t=0,4molH2O---> m=niuxM=0,4X18g=7,2g
solutia de acid este caracterizata de marimile
md=39,2g
ms=78,4g
c= mdx100/ms= 39,2x100/78,4=50%
Explicație: