P2: Fe+2HCl→FeCl2+H2(1)
3Fe2O3+6HCl→FeCl3+H2O(2)
nH2=2,24/22,4=0,1(mol)
Theo (1) nFe=nH2=0,1(mol)
mFe(P2)=mFe(P1)=0,1.56=5,6(g)
∑nFe=11,2/56=0,2(mol)
⇒nFe2O3=(0,2−0,1)/2=0,05(mol)
mFe2O3=0,05.160=8(g)
%Fe=5,6/(5,6+8).100%=41,18%
%Fe2O3=100%−41,18%=58,82%