\(H_2 + Cl_2 \xrightarrow{ánh\ sáng} 2HCl\\ Fe + 2HCl \to FeCl_2 + H_2\\ 2FeCl_2 + Cl_2 \to 2FeCl_3\\ FeCl_3 + 3KOH \to Fe(OH)_3 + 3KCl\\ Fe(OH)_3 + 3HCl \to FeCl_3 + 3H_2O\\ 4HCl + MnO_2 \to MnCl_2 + Cl_2 + 2H_2O\\ \)
\(2NaOH + Cl_2 \to NaCl + NaClO + H_2O\\ NaCl + H_2SO_4 \xrightarrow{t^o} NaHSO_4 + HCl\\ CuO + 2HCl \to CuCl_2 + H_2O\\ CuCl_2 + 2AgNO_3 \to Cu(NO_3)_2 + 2AgCl\)
1.
Cl2 + H2O <->HCl + HClO2HCl + Fe -> FeCl2 + H22FeCl2 + Cl2 -to> 2FeCl3FeCl3 + NaOH -> Fe(OH)3 + NaCl
2Fe(OH)3+6HCl->2FeCl3+3H2O
b>4HCl+MnO2->MnCl2+2H2O+Cl2
Cl2+2Na-to>2NaCl
2NaCl+2H2SO4đ-to>Na2SO4+2HCl
HCl+CuO->CuCl2+H2O
CuCl2+2AgNO3->2AgCl+Cu(NO3)2