Fe + 2HCl = FeCl2 + H2
FeCl2 + 2NaOH = Fe(OH)2 + 2NaCl
4Fe(OH)2+O2 + 2H2O = 4Fe(OH)3
2Fe(OH)3 + 3H2SO4 = Fe2(SO4)3 + 6H2O
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Fe + 2HCl = FeCl2 + H2
FeCl2 + 2NaOH = Fe(OH)2 + 2NaCl
4Fe(OH)2+O2 + 2H2O = 4Fe(OH)3
2Fe(OH)3 + 3H2SO4 = Fe2(SO4)3 + 6H2O