Write word equations and then balanced equations for the reaction taking place when

  • (a) dilute sulphuric acid reacts with zinc granules
  • (b) dilute hydrochloric acid reacts with magnesium ribbon
  • (c) dilute sulphuric acid reacts with aluminium powder
  • (d) dilute hydrochloric acid reacts with iron filing


Answer :

(a) $$Zinc + dilute sulphuric acid \rightarrow Zinc sulphate + Hydrogen $$

$$ Zn(s) + H_{2}SO_{4}(aq) $$

$$ \downarrow$$

$$ ZnSO_{4}(aq) + H_{2}(g) $$

(b) $$Magnesium ribbon + dil. Hydrochloric acid \rightarrow Magnesium chloride + Hydrogen $$

$$ Mg(s) + 2HCl(aq) $$

$$ \downarrow$$

$$ MgCl_{2} + H_{2}(g) $$

(c) $$Aluminium powder + dil. Sulphuric acid \rightarrow Aluminium sulphate + Hydrogen $$

$$ 2Al(s) + 3H_{2}SO_{4}(aq) $$

$$ \downarrow$$

$$Al_{2}(SO_{4})_{3} (aq) + 3H_{2}(g) $$

(d) $$Iron filings + Dilute hydrochloric acid \rightarrow Ferric chloride + Hydrogen$$

$$ 2Fe(s) + 6HCl(aq) $$

$$ \downarrow$$

$$2FeCl_{3}(aq) + 3H_{2}(g)$$

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