Mg->MgCl->Mg3(PO4)2->MgSO4
Fe->Cu->CuO->Cu(NO3)2
Fe(NO3)3->Fe(OH)3->Fe2O3->Fe
Al->Al2(SO4)3->Al(OH)3->NaAlO2
Ca->CaO->Ca(OH)2->Ca(HCO3)2
1)
а)+НСl
б)+Н3РО4
в)+Н2SO4
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Answers & Comments
1)
а)+НСl
б)+Н3РО4
в)+Н2SO4