3
Write balanced chemical equations for the reactions taking place when:
(i) Aluminium metal reacts with steam.
(ii) Magnesium reacts with dilute $\ce{HCl}$.
(i) Aluminium metal reacts with steam.
(ii) Magnesium reacts with dilute $\ce{HCl}$.
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(i) $\ce{2Al(s) + 3H2O(g) -> Al2O3(s) + 3H2(g)}$ (1 Mark)
(ii) $\ce{Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)}$ (1 Mark)
(Deduct $\frac{1}{2}$ mark for no/ incorrect balancing)
(ii) $\ce{Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)}$ (1 Mark)
(Deduct $\frac{1}{2}$ mark for no/ incorrect balancing)