【Daily Question】Theoretical Foundation 2019.4.18
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Multiple-choice question: For a second-order reaction, it takes 10 minutes to consume 1/3 of the reactant. How much time is required to consume another 1/3? ( ) A. 10 minutes B. 20 minutes C. 30 minutes D. 40 minutes Answer: C. For a second-order reaction with equal initial concentrations, the ratio of the time required to consume 1/2 of the reactant to the time required to consume 3/4 of it is 1:3. Similarly, the ratio of the time required to consume 1/3 of the reactant to the time required to consume another 1/3 should also be 1:3. Tip: The answer will be visible upon reply
A second-order reaction with equal initial substrate concentrations is characterized by a time ratio of 1 to 3 between the time required to consume 1/2 and the time required to consume 3/4; similarly, the time ratio between the time required to consume 1/3 and the additional time needed to consume another 1/3 should also be 1 to 3.