a) PTHH: Fe + 2HCl ===> FeCl2 + H2
nFe = 11,2 / 56 = 0,2 (mol)
=> nH2 = nFe = 0,2 mol
=> VH2(đktc) = 0,2 x 22,4 = 4,48 lít
nHCl = 2.nFe = 0,4 mol
=> mHCl = 0,4 x 36,5 = 14,6 gam
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\frac{11,2}{56}=0,2\left(mol\right)\)
\(\Rightarrow n_{HCl}=2n_{Fe}=2.0,2=0,4\left(mol\right)\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)
\(n_{H2}=n_{Fe}=0,2\left(mol\right)\)
\(\Rightarrow V_{H2}=0,2.22,4=4,48\left(l\right)\)