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Chemistry · May / June 2019 · Paper 12 · Question 10

5070Formulae

Powdered calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, water and carbon dioxide. What is the correct ionic equation, including state symbols, for this reaction?

  1. ACaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
  2. BCa2+(aq) + CO3^2–(aq) + 2H+(aq) → Ca2+(aq) + H2O(l) + CO2(g)
  3. CCO3^2–(aq) + 2H+(aq) → H2O(l) + CO2(g)
  4. DCaCO3(s) + 2H+(aq) → Ca2+(aq) + H2O(l) + CO2(g)

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Correct answer: D. CaCO3(s) + 2H+(aq) → Ca2+(aq) + H2O(l) + CO2(g)

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