Question

Al -> AlO3 -> Al2(SO4)3 -> Al(OH)3 -> K3AlO3

Answer 1

1) 4Al+3O2->2Al2O3
2)Al2O3+3H2SO4->Al2(SO4)3+3H2O
3)Al2(SO4)3+6NaOH->2Al(OH)3+3Na2SO4
4)Al(OH)3+3KOH-> K3AlO3+3H2O

Answer 2

4Al+3O2-->2Al2O3
Al2O3+3H2SO4-->Al2(SO4)3+3H2O
Al2(SO4)3+6NaOH-->2Al(OH)3+3Na2SO4
3KOH + Al(OH)3 = K3AlO3 + H2O.