5.8 In a pseudo first order hydrolysis of ester in water, the following results were obtained: t/s 30 60 90 [Ester/mol L 0.31 0.55 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.