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JAMB Chemistry 2003 Question 22

Question 22

Rates of Reaction

2HCl(aq) + CaCO3(s) → CaCl2(s) + CO2(g) + H2O(l)
From the reaction above, which of the curves in the diagram represents the production of carbon (IV) oxide as dilute HCl is added?

Diagram for this question
  1. A.L
  2. B.M
  3. C.N
  4. D.P
Show the answer and explanation

Answer: C (N)

Explanation

The amount of CO2 produced starts at zero, rises and then levels off when the reaction is complete; curve N has that shape. M falls, so it shows a reactant being used up.