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Chemistry · May / June 2023 · Paper 11 · Question 38

5070Carboxylic acids

An organic compound, P, is dissolved in water. The concentration of the solution is 0.1 mol / dm3 and the pH is 3. A solid is added to the solution and effervescence is seen. Which equation could represent this reaction?

  1. A2CH3CO2H(aq) + Mg(s) → (CH3CO2)2Mg(aq) + H2(g)
  2. B2CH3CO2H(aq) + 2Mg(s) → 2CH3CO2Mg(aq) + H2(g)
  3. C2CH3CO2H(aq) + K2CO3(s) → (CH3CO2)2K(aq) + CO2(g) + H2O(l)
  4. D2HCl (aq) + K2CO3(s) → 2KCl (aq) + CO2(g) + H2O(l)

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Correct answer: A. 2CH3CO2H(aq) + Mg(s) → (CH3CO2)2Mg(aq) + H2(g)

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