Write the reaction equations aluminum = aluminum chloride = aluminum hydroxide = sodium aluminate = aluminum nitrate

1) 2Al + 6HCl = 2AlCl3 + 3H2 (when aluminum interacts with hydrochloric acid, aluminum chloride and hydrogen are formed);

2) AlCl3 + 3KOH = Al (OH) 3 + 3KCl (when aluminum chloride interacts with potassium hydroxide, aluminum hydroxide and potassium chloride are formed);

3) Al (OH) 3 + NaOH = NaAlO2 + 2H2O (when aluminum hydroxide interacts with sodium hydroxide, sodium aluminate and water are formed);

4) NaAlO2 + 4HNO3 = Al (NO3) 3+ NaNO3 + 2H2O (when sodium aluminate interacts with nitric acid, aluminum nitrate, nitric acid and water are formed).