(1)4Fe(OH) 2+O 2+2H 2O = 4Fe(OH) 3
(2)Fe+2FeCl 3= 3FeCl 2
(3) Zn-2e -= Zn 2+;2H ++2e -= H 2↑
(4)2Fe-4e - = 2Fe 2+;O 2+2H 2O+4e -= 4OH -
(5)CH 3CH 2OH
CH 2=CH 2↑+H 2O
(1)4Fe(OH) 2+O 2+2H 2O = 4Fe(OH) 3
(2)Fe+2FeCl 3= 3FeCl 2
(3) Zn-2e -= Zn 2+;2H ++2e -= H 2↑
(4)2Fe-4e - = 2Fe 2+;O 2+2H 2O+4e -= 4OH -
(5)CH 3CH 2OH
CH 2=CH 2↑+H 2O