Написать уравнения для цепей превращений.
1.CuSO4 -> Cu(OH)2 -> CuCl2 -> CuS
2.MgO -> MgCl2 -> Mg(OH)2 -> MgSO4
3.CaO -> CaCl2 -> Ca(OH)2 -> CACO3 -> Ca(HCO3)2
4.ZnCl2 -> Zn(OH)2 -> Na2[Zn(OH)4] -> ZnSO4
5.NiCl2 -> Ni(OH)2 -> NiSO4 -> NiS
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