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Consider the following statements,The rate law for the acid catalysed hydrolysis of an ester being given asRate=k[H+][ester]=k′[ester].If the acid concentration is doubled at constant ester concentration1. The second order rate constant, k is doubled.2. The pseudo first order rate constant, k is double.3. The rate of the reaction is doubled.Which of the above statements are correct?1 and 22 and 31 and 31,2 and 3

Question

Consider the following statements,The rate law for the acid catalysed hydrolysis of an ester being given asRate=k[H+][ester]=k′[ester].If the acid concentration is doubled at constant ester concentration1. The second order rate constant, k is doubled.2. The pseudo first order rate constant, k is double.3. The rate of the reaction is doubled.Which of the above statements are correct?1 and 22 and 31 and 31,2 and 3

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Solution

The correct answer is 2 and 3.

Here's why:

  1. The second order rate constant, k, is not affected by the concentration of the reactants. It is a constant for a given reaction at a specific temperature. Therefore, statement 1 is incorrect.

  2. The pseudo first order rate constant, k', is dependent on the concentration of the acid. If the acid concentration is doubled, k' will also double. Therefore, statement 2 is correct.

  3. The rate of the reaction is directly proportional to the concentration of the acid. If the acid concentration is doubled, the rate of the reaction will also double. Therefore, statement 3 is correct.

This problem has been solved

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