1) 4Na+O2=2Na2O
Na2O+H2O=2NaOH
NaOH+HCl=NaCl+H2O
2) 2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+2HNO3=Ca(NO3)2+2H2O
1) 4Na+O2=2Na2O
Na2O+H2O=2NaOH
NaOH+HCl=NaCl+H2O
2) 2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+2HNO3=Ca(NO3)2+2H2O