This lab acquaints the student with characteristics of the most common chemical reactors such as CSTR, plug flow and batch reactors. Experimental measurements of the conversion out the mentioned three type reactors will be carried out, as will the mixing effect on the conversion of batch reactor is illustrated in lab. Effect of impeller type, position and speed is demonstrated in this lab by carrying out experiments with viscous and non viscous fluids and the mixing intensity is measured using spectrophotometer machine.