Chemistry 5070 · O Level · Ion and ionic bonds

Ion and ionic bonds — practice question

Powdered calcium carbonate is reacted with dilute hydrochloric acid to form calcium chloride, water and carbon dioxide. Which ionic equation, complete with state symbols, is correct for this reaction?

  • A$\text{CaCO}_3(s) + 2\text{HCl}(aq) \rightarrow \text{CaCl}_2(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g)$
  • B$\text{Ca}^{2+}(aq) + \text{CO}_3^{2-}(aq) + 2\text{H}^+(aq) \rightarrow \text{Ca}^{2+}(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g)$
  • C$\text{CO}_3^{2-}(aq) + 2\text{H}^+(aq) \rightarrow \text{H}_2\text{O}(l) + \text{CO}_2(g)$
  • D$\text{CaCO}_3(s) + 2\text{H}^+(aq) \rightarrow \text{Ca}^{2+}(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g)$

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