1)2Ca+O2-->2CaO
CaO+H2O-->Ca(OH)2
Ca(OH)2+2HNO3-->Ca(NO3)2+2H2O
Ca(NO3)2+H2SO4-->CaSO4+2HNO3
2)Al2O3+3H2SO4-->Al2(SO4)3+3H2O
Al2(SO4)3+6NaOH-->2Al(OH)3+3Na2SO4
2Al(OH)3-->(t) Al2O3+3H2O
5)2Mg+O2-->MgO
MgO+H2O-->Mg(OH)2
Mg(OH)2+H2SO4-->MgSO4+2H2O
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1)2Ca+O2-->2CaO
CaO+H2O-->Ca(OH)2
Ca(OH)2+2HNO3-->Ca(NO3)2+2H2O
Ca(NO3)2+H2SO4-->CaSO4+2HNO3
2)Al2O3+3H2SO4-->Al2(SO4)3+3H2O
Al2(SO4)3+6NaOH-->2Al(OH)3+3Na2SO4
2Al(OH)3-->(t) Al2O3+3H2O
5)2Mg+O2-->MgO
MgO+H2O-->Mg(OH)2
Mg(OH)2+H2SO4-->MgSO4+2H2O