\(n_{Fe}=\dfrac{7}{56}=0,125\left(mol\right)\)
\(a.Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\dfrac{n_{HCl}}{2}=n_{H_2}=0,125\left(mol\right)\)
\(b.V_{H_2}=0,125\times22,4=2,8\left(l\right)\)
\(c.n_{HCl}=0,125\times2=0,25\left(mol\right)\)
\(c.200ml=0,2l\rightarrow C_{M_{HCl}}=\dfrac{0,25}{0,2}=1,25\left(M\right)\)
a) Fe + 2HCl → FeCl2 + H2
b) \(n_{Fe}=\dfrac{7}{56}=0,125\left(mol\right)\)
Theo pT: \(n_{H_2}=n_{Fe}=0,125\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,125\times22,4=2,8\left(l\right)\)
c) Theo pT: \(n_{HCl}=2n_{Fe}=2\times0,125=0,25\left(mol\right)\)
\(\Rightarrow C_{M_{HCl}}=\dfrac{0,25}{0,2}=1,25\left(M\right)\)