question_answer 17)

In a pseudo first order hydrolysis of ester in water the following results were obtained :  

t/s	0	30	60	90
[Ester]/M	0.55	0.31	0.17	0.085

  (i) Calculate the average rate of reaction between the time interval 30 to 60 seconds. (ii) Calculate the pseudo first order rate constant for the hydrolysis of ester.

Answer:

(i) Average rate of reaction   (ii) = 1.91 × 10?2 s?1.