\(n_{Fe}=a,n_{Fe_2O_3}=b:trong.1.phần\\ Phần.I:\\ Fe_2O_3+3H_2->2Fe+3H_2O\\ n_{Fe}=a+2b=\dfrac{11,2}{56}=0,2\left(I\right)\\ Phần.II:\\ Fe+2HCl->FeCl2+H_2\\ a=\dfrac{2,24}{22,4}=0,1\\ b=0,05\\ \%m_{Fe}=\dfrac{56\cdot0,1}{56\cdot0,1+0,05\cdot160}=41,18\%\\ \Rightarrow\%m_{Fe_2O_3}=58,82\%\)

\(n_{khí}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)

PTHH:

\(Fe_2O_3+3H_2\xrightarrow[t^o]{}2Fe+3H_2O\left(1\right)\\ Fe_2O_3+3CO\xrightarrow[t^o]{}2Fe+3CO_2\left(2\right)\)

Theo PTHH \(\left(1\right)\left(2\right):n_{Fe_2O_3}=\dfrac{1}{3}n_{khí}=\dfrac{1}{3}.0,6=0,2\left(mol\right)\)

=> m = 0,2.160 = 32 (g)

\(n_{CuO}=2a\left(mol\right)\Rightarrow n_{Fe_2O_3}=a\left(mol\right)\)

\(m_X=80\cdot2a+160a=80\left(g\right)\)

\(\Rightarrow a=0.25\left(mol\right)\)

\(CuO+H_2\underrightarrow{^{^{t^0}}}Cu+H_2O\)

\(Fe_2O_3+3H_2\underrightarrow{^{^{t^0}}}2Fe+3H_2O\)

\(n_{H_2}=0.5+0.25\cdot3=1.25\left(mol\right)\)

\(V_{H_2}=1.25\cdot22.4=28\left(l\right)\)

\(m_{cr}=0.5\cdot64+0.5\cdot56=60\left(g\right)\)

a.b.

\(\left\{{}\begin{matrix}n_{Fe_2O_3}=40.80\%=32g\\m_{CuO}=40-32=8g\end{matrix}\right.\)

\(\left\{{}\begin{matrix}n_{Fe_2O_3}=\dfrac{32}{160}=0,2mol\\n_{CuO}=\dfrac{8}{80}=0,1mol\end{matrix}\right.\)

\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)

0,1        0,1            0,1                 ( mol )

\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)

0,2            0,6               0,4                  ( mol )

\(V_{H_2}=\left(0,1+0,6\right).22,4=15,68l\)

\(\left\{{}\begin{matrix}m_{Cu}=0,1.64=6,4g\\m_{Fe}=0,4.56=22,4g\end{matrix}\right.\)

\(\rightarrow\left\{{}\begin{matrix}\%m_{Cu}=\dfrac{6,4}{6,4+22,4}.100=22,22\%\\\%m_{Fe}=100\%-22,22\%=77,78\%\end{matrix}\right.\)

c.
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\) ( Cu không phản ứng với H₂SO₄ loãng )

0,4                                      0,4    ( mol )

\(V_{H_2}=0,4.22,4=8,96l\)

a, -Gọi số mol của CuO và Fe2O3 lần lượt là x, y ( mol )

PTKL : \(80x+160y=40\left(I\right)\)

\(CuO+H_2\rightarrow Cu+H_2O\)

..x.........x............

\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)

...y............3y......

=> \(n_{H_2}=x+3y=\dfrac{V}{22,4}=0,6\left(mol\right)\left(II\right)\)

- Giair I và II ta được : x = 0,3 , y = 0,1 ( mol )

=> \(\left\{{}\begin{matrix}mCuO=n.M=24\left(g\right)\\mFe2O3=mhh-mCuO=16\left(g\right)\end{matrix}\right.\)

b, \(\%CuO=\dfrac{m}{mhh}.100\%=60\%\)

=> %Fe2O3 =100% - %CuO = 40% .

Vậy ...

PT: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

\(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)

Giả sử: \(\left\{{}\begin{matrix}n_{Fe_2O_3}=x\left(mol\right)\\n_{CuO}=y\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow160x+80y=40\left(1\right)\)

Ta có: \(n_{H_2}=\dfrac{14,56}{22,4}=0,65\left(mol\right)\)

Theo PT: \(n_{H_2}=3n_{Fe_2O_3}+n_{CuO}=3x+y\left(mol\right)\)

⇒ 3x + y = 0,65 (2)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,15\left(mol\right)\\y=0,2\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{Fe_2O_3}=\dfrac{0,15.160}{40}.100\%=60\%\\\%m_{CuO}=40\%\end{matrix}\right.\)

Bạn tham khảo nhé!