1)
4Al+3O2-->2Al2O3
Al2O3+6HCL-->2AlCL3+3H2O
AlCL3+3NaOH-->AL(OH)3+3NaCL
2)
2Ba+O2-->2BaO
BaO+H2O->Ba(OH)2
Ba(OH)2+H2SO4-->BaSO4+2H2O
1)
4Al+3O2-->2Al2O3
Al2O3+6HCL-->2AlCL3+3H2O
AlCL3+3NaOH-->AL(OH)3+3NaCL
2)
2Ba+O2-->2BaO
BaO+H2O->Ba(OH)2
Ba(OH)2+H2SO4-->BaSO4+2H2O