WAEC Chemistry 2010 Objective — Question 18
Question 18 of 49 from the West African Examinations Council (WAEC) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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Consider the neutralization reaction represented by the following equation: Na2CO3+2HNO3→2NaNO3+H2O+CO2. The stoichiometric ratio of acid to base is
- A. A. 2:2
- B. B. 2:1
- C. C. 1:2Correct
- D. D. 1:1
Explanation
The stoichiometric ratio of acid to base simply refers to the ratio of the mole of the acid to that of the base. Since the moles of acid in the balanced equation is 2, while that of the base is 1, the ratio is 2:1... (Note: the question asks for the ratio of acid to base as it is written; since HNO3 has coefficient 2 and Na2CO3 has coefficient 1, the ratio of acid:base is 2:1, matching option B.)
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