BaO->BaCl2->BaSO4
BaO+2 HCl=BaCl2+H2O
BaCl2+Na2SO4=BaSO4↓+2 NaCl
Ca->Ca(OH)2->CaCO3->CO->CaCl2->CaCO3
Ca+2 H2O=Ca(OH)2+H2
Ca(OH)2+Na2CO3=CaCO3+2 NaOH
CaCO3=СaO+CO2
CaO+2 HCl=CaCl2+H2O
СaCl2+CO2+H2O=CaCO3+2 HCl
CuO->CuSO4->Cu(OH)2->CuO->CuCl2
CuO+H2SO4=CuSO4+H2O
CuSO4+2 NaOH=Cu(OH)2+Na2SO4
Cu(OH)2=CuO+H2O
CuO+2 HCL=CuCl2+H2O
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Answers & Comments
BaO->BaCl2->BaSO4
BaO+2 HCl=BaCl2+H2O
BaCl2+Na2SO4=BaSO4↓+2 NaCl
Ca->Ca(OH)2->CaCO3->CO->CaCl2->CaCO3
Ca+2 H2O=Ca(OH)2+H2
Ca(OH)2+Na2CO3=CaCO3+2 NaOH
CaCO3=СaO+CO2
CaO+2 HCl=CaCl2+H2O
СaCl2+CO2+H2O=CaCO3+2 HCl
CuO->CuSO4->Cu(OH)2->CuO->CuCl2
CuO+H2SO4=CuSO4+H2O
CuSO4+2 NaOH=Cu(OH)2+Na2SO4
Cu(OH)2=CuO+H2O
CuO+2 HCL=CuCl2+H2O