+ $Na$:
$2NaCl\buildrel{{\text{đpnc}}}\over\longrightarrow 2Na+Cl_2$
+ $Cu$:
$CuCl_2\buildrel{{\text{đpdd}}}\over\longrightarrow Cu+Cl_2$
+ $Mg$:
$MgCO_3+2HCl\to MgCl_2+CO_2+H_2O$
$MgCl_2\buildrel{{\text{đpnc}}}\over\longrightarrow Mg+Cl_2$
+ $Ca$:
$CaCl_2\buildrel{{\text{đpnc}}}\over\longrightarrow Ca+Cl_2$
+ $Al$:
$3Mg+2AlCl_{3_{(dd)}}\to 3MgCl_2+2Al$