Fe + 2HCl ➝ FeCl2 + H2 (1)
FeO + 2HCl ➝ FeCl2 + H2O (2)
\(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT1: \(n_{Fe}=n_{H_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,2\times56=11,2\left(g\right)\)
Theo PT1: \(n_{HCl}=2n_{H_2}=2\times0,2=0,4\left(mol\right)\)
Ta có: \(\Sigma n_{FeCl_2}=\dfrac{50,8}{127}=0,4\left(mol\right)\)
Theo PT1,2: \(\Sigma n_{HCl}=2\Sigma n_{FeCl_2}=2\times0,4=0,8\left(mol\right)\)
\(\Rightarrow\Sigma m_{HCl}=0,8\times36,5=29,2\left(g\right)\)
Ta có: \(n_{HCl\left(2\right)}=0,8-0,4=0,4\left(mol\right)\)
Theo PT2: \(n_{FeO}=\dfrac{1}{2}n_{HCl}=\dfrac{1}{2}\times0,4=0,2\left(mol\right)\)
\(\Rightarrow m_{FeO}=0,2\times72=14,4\left(g\right)\)
\(\Sigma m_{hh}=14,4+11,2=25,6\left(g\right)\)
\(\%m_{Fe}=\dfrac{11,2}{25,6}\times100\%=43,75\%\)
\(\%m_{FeO}=\dfrac{14,4}{25,6}\times100\%=56,25\%\)
