FeCl2+NaOH=CuCl2+H2S
Fe 2+ +Cl2 - + Na+ +OH- =Cu 2+ +Cl2 - + H2 + +S 2-
Fe 2+ + Na + + OH- = Cu 2+ +H2 + + S 2-
FeCl2+NaOH=CuCl2+H2S
Fe 2+ +Cl2 - + Na+ +OH- =Cu 2+ +Cl2 - + H2 + +S 2-
Fe 2+ + Na + + OH- = Cu 2+ +H2 + + S 2-