Sửa đề: 34,48 → 4,48
a, - Phần 1: \(Fe+2HCl\rightarrow FeCl_2+H_2\) (1)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\) (2)
- Phần 2: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\) (3)
b, Ta có: \(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT (1): \(n_{Fe\left(1\right)}=n_{H_2}=0,2\left(mol\right)\)
\(n_{Fe}=\dfrac{33,6}{56}=0,6\left(mol\right)=n_{Fe\left(3\right)}+n_{Fe\left(1\right)}\)
\(\Rightarrow n_{Fe\left(3\right)}=0,4\left(mol\right)\)
Theo PT (3): \(n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe\left(3\right)}=0,2\left(mol\right)\)
\(\Rightarrow m_X=2.\left(m_{Fe\left(1\right)}+m_{Fe_2O_3}\right)=2.\left(0,2.56+0,2.160\right)=86,4\left(g\right)\)