Fe2(SO4)3 + 6NaOH -> 2Fe(OH)3 + 3Na2SO4
2Fe(OH)3 ------------> Fe2O3 + 3H2O /nad strzałką temp./
2Fe2O3 + C -> 4FeO + CO2
FeO + 2HCl -> FeCl2 + H2O
FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl
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Fe2(SO4)3 + 6NaOH -> 2Fe(OH)3 + 3Na2SO4
2Fe(OH)3 ------------> Fe2O3 + 3H2O /nad strzałką temp./
2Fe2O3 + C -> 4FeO + CO2
FeO + 2HCl -> FeCl2 + H2O
FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl