Write word equations and then balanced chemical equations for the reactions taking place when:
$(a)$ Dilute sulphuric acid reacts with aluminium powder.
$(b)$ Dilute hydrochloric acid reacts with iron filings.

(N/A) Word equation: $\text{Sulphuric acid} + \text{Aluminium} \rightarrow \text{Aluminium sulphate} + \text{Hydrogen}$
Balanced equation: $3H_{2}SO_{4(aq)} + 2Al_{(s)} \rightarrow Al_{2}(SO_{4})_{3(aq)} + 3H_{2(g)}$
$(b)$ Word equation: $\text{Hydrochloric acid} + \text{Iron} \rightarrow \text{Iron(II) chloride} + \text{Hydrogen}$
Balanced equation: $Fe_{(s)} + 2HCl_{(aq)} \rightarrow FeCl_{2(aq)} + H_{2(g)}$