First, Introduction In chemical kinetics, the determination of the reaction order is very important, which is related to the in-depth understanding of the reaction mechanism and the precise control of the reaction rate. As a classic case, the saponification of ethyl acetate is of great significance to the development of chemistry. Second, the experimental principle
The saponification of ethyl acetate is\ (CH_3COOC_2H_5 + NaOH\ longrightarrow CH_3COONa + C_2H_5OH\). In dilute solution, this reaction can be approximated as a second-order reaction. The reaction rate is related to the concentration of the reactants, and the rate equation is\ (v = kc (CH_3COOC_2H_5) c (NaOH) \), where\ (k\) is the reaction rate constant.

III. Experimental steps
1. ** Reagent preparation **: Accurately prepare a certain concentration of ethyl acetate and sodium hydroxide solution to ensure the purity and concentration accuracy of the reagent.
2. ** Reaction proceeds **: The two are rapidly mixed in a constant temperature environment in different proportions, and a stopwatch is started to record the reaction time.
3. ** Data determination **: The change of conductivity of the reaction system is measured in real time by using a conductivity meter. Due to the change of ion concentration during the reaction, the conductivity also changes, which characterizes the reaction process.

IV. Data processing and analysis
1. ** DATA RECORD **: Record the conductivity values of the reaction system at different times to form a time-conductivity data set.
2. ** Calculation Derivation **: According to the kinetic equation of the second-order reaction, the data are mathematically processed. Assume that the reaction is a second-order reaction. By linear fitting and other methods, if a good linear relationship can be obtained, the hypothesis can be verified. For example, plot\ (\ frac {1} {c}\) against time\ (t\). If a straight line is obtained, the reaction is a second-order reaction.

Fifth, Conclusion
After experiments and in-depth analysis of the data, it is determined that the saponification reaction of ethyl acetate is a second-order reaction. This conclusion is in line with theoretical expectations and further verifies the relevant The accurate determination of the reaction order lays a solid foundation for subsequent chemical industrial production and related theoretical research.