Question

(a) Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
(b) Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?

Answer 1

(a) Sodium displaces hydrogen from dilute hydrochloric acid.
2Na(s) + 2HCl(aq) $\to$ 2NaCl(aq) + H₂(g)

(b) Magnesium and aluminium are two metals that can displace hydrogen from dilute hydrochloric acid.