Question

Write word equations and then balanced equations for the reactions taking place when
(a) dilute sulphuric acid reacts with zinc granules.
(b) dilute hydrochloric acid reacts with magnesium ribbon.
[2 Marks]

Answer 1

(a) Word equation:
Sulphuric acid + Zinc → Zinc sulphate + Hydrogen gas
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Balanced equation:
${\text{H}}_2{\text{SO}}_4\left(aq\right)+\text{Zn}\left(s\right)\to {\text{ZnSO}}_4\left(aq\right)+{\text{H}}_2\left(g\right)$
[ 0.5 Mark ]

(b) Word equation:
Hydrchloric acid + Magnesium → Magenssium chloride + Hydrogen gas
[ 0.5 Mark ]

Balanced equation:
$\text{2HCl}\left(aq\right)+\text{Mg}\left(s\right)\to {\text{MgCl}}_2\left(aq\right)+{\text{H}}_2\left(g\right)$
[ 0.5 Mark ]