Question

(e) What happens when:
(a) Iron is treated with sulphuric acid?
(b) Aluminium is treated with hydrochloric acid?​

Answer 1

a) Iron metal dissolves readily in dilute sulphuric acid in the absence of oxygen to form solutions containing the aquated Fe(II) ion together with hydrogen gas, H2. ... The strongly oxidizing concentrated nitric acid, HNO3, reacts on th surface of iron and passivates the surface.

b) Aluminum reacts with diluted hydrochloric acid at room temperature. The metal aluminium dissolves in hydrochloric acid, producing aluminum chloride and colorless hydrogen gas. The reaction taking place between aluminium and hydrochloric acid is irreversible. And the final products will not react with each other.