JAMB Chemistry 2007 Objective — Question 27
Question 27 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2007 Objective paper, with the correct answer and a full explanation.
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Na2S2O3(aq) + 2HCl(aq) -> 2NaCl(aq) + H2O(l) + SO2 + S(s). Which of the following would increase the rate of the chemical reaction above?
- A. A decrease in temperature and an increase in the concentration of the reactants
- B. An increase in temperature and a decrease in the concentration of the reactants
- C. An increase in temperature and an increase in the concentration of the reactantsCorrect
- D. A decrease in volume and an increase in the pressure of the reactants
Explanation
Both raising temperature and raising reactant concentration independently speed up reactions; together they synergistically increase the rate.
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