СРОЧНО!!! Осуществить цепочки превращений:
[tex]1. FeCl_{3} -X-Fe(OH)_{2} - FeO \\ 2.FeO-X-FeCl_{2}-Fe(OH)_{2} \\ 3.FeSO_{4}-X-FeCl_{3}-Fe(OH)_{3} \\ 4.Fe_{2}(SO_{4})_{3}-X-Fe_{2}O_{3}-Fe \\ 5.Fe(NO_{3})_{3}-X-Fe_{2}O_{3}-Fe \\ 6.Fe_{2}O_{3}-Fe-X-Fe(OH)_{2} \\ 7.Fe(OH)_{2}-FeSO_{4}-Fe_{2}(SO_{4})_{3}-X \\ 8.Fe-FeCl_{2}-FeSO_{4}-Fe[/tex]
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