4)Al-Al2O3-AlCl3-Al(OH)3-Al2(SO4)3     Хеееллп Срочнооо(цепочка превращений) 

                                               - Na Al(OH)4

 

2) СuS-CuO-CuCl2-Cu(OH)2-CuSo4-Cu

 

3) Fe3O4-Fe-FeCl2-Fe(OH)2-Fe(OH)3-Fe2(SO4)3

 

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