Chemistry 0620 · IGCSE · Preparation of salts

Preparation of salts — practice question

Carbon dioxide gas reacts with aqueous calcium hydroxide to produce calcium carbonate. Which equation shows this reaction?

  • A$\mathrm{CO}_2(g) + \mathrm{Ca(OH)}_2(aq) \rightarrow \mathrm{CaCO}_3(s) + \mathrm{H}_2\mathrm{O}(l)$
  • B$\mathrm{CO}_2(g) + \mathrm{Ca(OH)}_2(aq) \rightarrow \mathrm{CaCO}_3(aq) + \mathrm{H}_2\mathrm{O}(l)$
  • C$2\mathrm{CO}_2(g) + 2\mathrm{CaOH}(aq) \rightarrow 2\mathrm{CaCO}_3(s) + \mathrm{H}_2(g)$
  • D$2\mathrm{CO}_2(g) + 2\mathrm{CaOH}(aq) \rightarrow 2\mathrm{CaCO}_3(aq) + \mathrm{H}_2(g)$

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