Ca+2HCl=CaCl2+H2
Ca^(+2)+2H^(+2)+2Cl^(1-)= Ca^(+2)+2Cl^(1-)+H(1+)
Mg+2HCl=MgCl2+H2
Mg^(+2)+2H^(+2)+2Cl^(1-)= Mg^(+2)+2Cl^(1-)+H(1+)
Zn+2HCl=ZnCl2+H2
Zn^(+2)+2H^(+2)+2Cl^(1-)= Zn^(+2)+2Cl^(1-)+H(1+)
Cu+HCl=X
Ag+HCl=X
Fe+2HCl=FeCl2+H2
Fe^(+2)+2H^(+2)+2Cl^(1-)= Fe(+2)+2Cl^(1-)+H(1+)