Question

al-al(oh)3-al2o3-al-alcl3-al(oh)3

Answer 1

Вот так, думаю:

2Al + 6H2O = 2Al(OH)3 + 3H2

2Al(OH)3 = Al2O3 + 3H2

Al2O3+3H2 = 2Al+3H2O 

2Al +3Cl2 = 2AlCl3  

AlCl3 + 3NaOH = Al(OH)3 + 3NaCl