$n_{HCl} = 0,44(mol) ; n_{H_2} = 0,02(mol)$
$2H^+ + O^{2-} \to H_2O$
$2H^+ + 2e \to H_2$
Ta có :
$n_{H^+} = 2n_O + 2n_{H_2} \Rightarrow n_O = \dfrac{0,44 - 0,02.2}{2} = 0,2(mol)$
$\Rightarrow m_1 = m_{Fe} + m_O = 11,2 + 0,2.16 = 14,4(gam)$
$n_{Fe} = 0,2(mol)$
Bảo toàn Cl, $n_{AgCl} = n_{HCl} = 0,44(mol)$
Bảo toàn electron, $3n_{Fe} = 2n_O + 2n_{H_2} + n_{Ag}$
$\Rightarrow n_{Ag} = 0,2.3 - 0,2.2 - 0,02.2 = 0,16(mol)$
$Rightarrow m_2 = m_{AgCl} + m_{Ag} = 0,44.143,5 + 0,16.108 = 80,42(gam)$