2)2Mg+O2=2MgO
MgO+H2SO4=MgSO4+H2O
MgSO4+2NaOH=Mg(OH)2+Na2SO4
Mg(OH)2+2HCl=MgCl2+2H2O
4)CO2+H2O=H2CO3
CuO+2HCl=CuCl2+H2O
Ca(OH)2+H2SO4=CaSO4+2H2O
2Cu+2HCl=2CuCl+H2
2KOH+CO2=K2CO3+H2O
Na2O+H2O=2NaOH
2)2Mg+O2=2MgO
MgO+H2SO4=MgSO4+H2O
MgSO4+2NaOH=Mg(OH)2+Na2SO4
Mg(OH)2+2HCl=MgCl2+2H2O
4)CO2+H2O=H2CO3
CuO+2HCl=CuCl2+H2O
Ca(OH)2+H2SO4=CaSO4+2H2O
2Cu+2HCl=2CuCl+H2
2KOH+CO2=K2CO3+H2O
Na2O+H2O=2NaOH