PT: \(CuO+CO\underrightarrow{t^o}Cu+CO_2\)
\(Fe_3O_4+4CO\underrightarrow{t^o}3Fe+4CO_2\)
Giả sử: \(\left\{{}\begin{matrix}n_{CuO}=x\left(mol\right)\\n_{Fe_3O_4}=y\left(mol\right)\end{matrix}\right.\)
⇒ 80x + 232y = 39,2 (1)
Ta có: \(n_{CO}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)
Theo PT: \(n_{CO}=n_{CuO}+4n_{Fe_3O_4}=x+4y\left(mol\right)\)
⇒ x + 4y = 0,6 (2)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,2\left(mol\right)\\y=0,1\left(mol\right)\end{matrix}\right.\)
Theo PT: \(n_{Fe}=3n_{Fe_3O_4}=0,3\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,3.56=16,8\left(g\right)\)
Bạn tham khảo nhé!
\(n_{CuO}=a\left(mol\right),n_{Fe_3O_4}=b\left(mol\right)\)
\(m_X=80a+232b=39.2\left(g\right)\left(1\right)\)
\(n_{H_2}=\dfrac{13.44}{22.4}=0.6\left(mol\right)\)
\(CuO+CO\underrightarrow{^{^{t^0}}}Cu+CO_2\)
\(Fe_3O_4+4CO\underrightarrow{^{^{t^0}}}3Fe+4CO_2\)
\(n_{H_2}=a+4b=0.6\left(mol\right)\left(2\right)\)
\(\left(1\right),\left(2\right):a=0.2,b=0.1\)
\(\%Fe=\dfrac{0.1\cdot3\cdot56}{0.2\cdot64+0.1\cdot3\cdot56}\cdot100\%=56.75\%\)
