2K+H2CO3=K2CO3+H2
12Mg+4Al2O3=Mgo+8Al
K2O+2HNO3=2KNO3+H2O
2LiOH+H2SO3=Li2SO3+2H2O
ZnSO4+2NaOH=Zn(OH)2+Na2SO4
2K+H2CO3=K2CO3+H2
12Mg+4Al2O3=Mgo+8Al
K2O+2HNO3=2KNO3+H2O
2LiOH+H2SO3=Li2SO3+2H2O
ZnSO4+2NaOH=Zn(OH)2+Na2SO4