The set is mounted on the base plate and easily can be installed on the chemical reactor service unit for conducting experiments. Reactants are fed to the system and mixed in the reactor. A variable speed mixer with speed control facility is provided to conduct the experiment on different speed of the impeller thus to determine the effect of mixer speed. Detachable baffles also accompany the reactor vessel. A coil is placed in the reactor through whom hot water with constant temperature is circulated which enables to enhance the experimentations for different temperature