Essay about Saponifacation of Ethyl Acetate and Soldium Hydroxide

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Ethyl Acetate – NaOH Reaction Kinetics Experiment Martin Novick Group 14, Chemical Engineering Laboratory Submitted to Prof. David B. Henthorn September 25, 2012 Summary The goal of this project was to determine the pre-exponential factor, k o , the activation energy, E, and the reaction rate constants, k, of the saponification process of ethyl acetate using sodium hydroxide (NaOH) at 5 temperature between 15 and 25 degrees Celsius. Two trails were performed at temperatures 16, 18, 20, 22, and 24 degrees Celsius. The main equipment of the project were the jacketed beaker batch reactor and the LabPro conductivity probe. The solution’s conductivity throughout the reaction was collected and plotted in a linearized plot against time to…show more content…
To find the value of the pre-exponential factor, ������������ , and activation energy, ������, would require linearizing the Arrhenius equation given as: k = k o ������ −������������ , where R is the gas constant and T is the temperature the given k is at in degrees Kelvin. Equation 8 is linearized by taking the natural log of both sides: ln(k) = ln(k o ) − E . RT 1 ������ ������ (8) (9) to retrieve a linear plot with Equation 9 shows a linear relationship between ln(k) and 4 the y-intercept being ln(������������ ) and the slope being ������. Hence: k o = ey−intercept . ������ = ������������������������������ × ������ (10) (11) ������ Equipment, Materials, and Method The equipment used were a jacketed batch reactor beaker, cooling water circulation system, computer, LabPro temperature probe and conductivity probe, mixing stand and magnetic stir bar. The materials used for this reaction were a 0.08M NaOH solution and a 0.1M ethyl acetate solution. A 20% excess Ethyl acetate was used to ensure NaOH was the limiting reactant.[1] NaOH was chosen for the limiting reactant because of its high conductivity relative to Ethyl acetate. The extent of the reaction was monitored by measuring the conductivity throughout the reaction. With NaOH being the limiting reactant, the change in conductivity is more visible, and the termination of the reaction can
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