PT: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
Ta có: \(n_{Fe_2O_3}=\dfrac{32}{160}=0,2\left(mol\right)\)
\(n_{H_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\)
Xét tỉ lệ: \(\dfrac{0,2}{1}< \dfrac{0,75}{3}\), ta được H2 dư.
Theo PT: \(n_{Fe\left(LT\right)}=2n_{Fe_2O_3}=0,4\left(mol\right)\)
Mà: H% = 80%
\(\Rightarrow n_{Fe\left(TT\right)}=0,4.80\%=0,32\left(mol\right)\)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
Theo PT: \(n_{H_2}=n_{Fe}=0,32\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,32.22,4=7,168\left(l\right)\)
Bạn tham khảo nhé!