3.5 ml ethyl acetate was added to a flask containing 100 ml of 0.1 M HCI placed in a thermostat maintained at `30^(@)`C 5 ml of the reaction mixture was withdrawn at different interval of time and after chilling titrated against standard NaOH the following data were obtained
Time (minutes) 0 75 119 183 `infty`
NaOH used (mL) 9.62 12.10 13.10 14.75 21.05
From the above data show that the hydrolysis of ethyl acetate is a first order reaction

Explanation

Here `V_(infty) -V_(0)=21.05 -9.62 =11.43 mL`
Time (t) `V_(prop)-V_(t) (1)/(t) ln (V_(prop)-V_(0))/(V_(prop)-V_(t))=k`
183 min 21.05 - 14.75 =6.30 `1/183 ln 11.43/6.30=0.003254 min^(-1)`
A constant value of k show tht the hydorlysis of ethyl acetate is a first order reaction