Question

(a) Give one example, with an 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.

$2Na\left(s\right)+2HCl\left(aq\right)\to 2NaCl\left(aq\right)+H_2\left(g\right)$

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