C2H6+Cl2=C2H5CL+HCl
C2H5Cl+2Na+ClC2H5=2NaCl+C2H5-C2H5
C4H10+Cl2=C4H9Cl+Hcl
C4H9Cl+2Na+ClC4H9=2NaCl+C8H18
2C8H18+5O2=4C4H8O2+2H2O
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