Ca->CaO->Ca(OH)2->CaCl2
2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+2HCl=CaCl2+2H2O
Zn->ZnCl2->Zn(OH)2->ZnO
Zn+2HCl=ZnCl2+H2
ZnCl2+2NaOH=Zn(OH)2+2NaCl
Zn(OH)2=ZnO+H2O
3 цепочка реакции
2Cu+O2=2CuO
CuO+2HCl=CuCl2+H2O
CuCl2+H2=Cu+2HCl
2CuO=2Cu+O2
CuO+H2SO4=CuSO4+H2O