a) Fe + 2HCl --> FeCl2 + H2
b) \(n_{Fe}=\dfrac{5,4}{56}=\dfrac{27}{280}\left(mol\right)\)
Fe + 2HCl --> FeCl2 + H2
Xét tỉ lệ: \(\dfrac{\dfrac{27}{280}}{1}< \dfrac{0,4}{2}\) => Fe hết, HCl dư
Fe + 2HCl --> FeCl2 + H2
\(\dfrac{27}{280}\)----------->\(\dfrac{27}{280}\)-->\(\dfrac{27}{280}\)
=> VH2 = \(\dfrac{27}{280}.22,4=2,16\left(l\right)\)
c) \(n_{FeCl_2}=\dfrac{27}{280}\left(mol\right)\)