Question

Aluminium powder is added with concentrated and boiled sodium hydroxide solution.what will happen,?

Answer 1

Al2O3 + 2 NaOH → 2Na+ + 2[Al(OH)4]-

After further reaction:

2 Al + 2 NaOH + 6 H2O → 2 Na+ + 2[Al(OH)4]- + 3 H2 (gas)