2Al+6HCl==2AlCl3+3H2↑
Al+2NaOH+2H2O==2NaAlO2+3H2↑
AlCl3+3NaOH==Al(OH)3↓+3NaCl
Al(OH)3+3HCl==AlCl3+3H2O
Al(OH)3+NaOH==NaAlO2+H2O
NaAlO2+HCl+H2O==Al(OH)3↓+NaCl
NaAlO2+4HCl==AlCl3+3NaCl+2H2O