Chemical kinetics is the part of physical chemistry that studies reaction rates of the reaction. As in this project we study the kinetics of saponification reaction by hydrolysis of ethyl acetate with caustic soda (sodium hydroxide) to produce ethanol and sodium acetate which takes place in a liquid plug flow reactor as this reaction is considered one of the most known reactions in the chemical industry, where ethanol is considered as a great major in chemical industries as it can reacts with acetic acid to produce ethyl acetate, also sodium acetate which is used in many applications such as soap