Title : Order of Reaction: Kinetics Study of Hydrolysis Reaction of Methyl Formate Using An Acidic Ion Exchanger.
Objectives :
1. To study the effect of high activation energy upon k values of methyl formate.
2. To report the rate law expression for decomposition of methyl formate.
3. To determine the integrated rate law for methyl formate.
4. To demonstrate how rate constants vary with temperature and activation energy.
Chemicals and Apparatus :
1. Methyl formate (m.w. = 60.05 g/mol, d= 0.97 g/mol)
2. Methanol (m.w. = 32.04 g/mol, d= 0.79 g/mol)
3. Ion exchanger I, strongly acid cation exchanger, H+ form (Merck)
4. Magnetic stirrer hotplate
5. 2 magnetic stirring bars
6. Crystallalizing dish (for water bath)
7. 2 beakers 250 mL
8. Contact thermometer
9. Conductivity measuring cell
10. Temperature probe
11. Graduated measuring pipette 15 mL
12. Volumetric pipette 25 mL
13. Volumetric pipette 50 mL
14. 3 pipet bulbs
15. Tea bag
Method/Procedures :
1. The apparatus was set – up as shown below in the Figure 1.1
2. 94 mL of distilled water and 49 mL of methanol were pipetted into a beaker which was placed in a water bath. A tea bag containing 20 g ion exchanger was submerged into the solution.
3. A hotplate stirrer and a contact thermometer were used to warm the aqueous methanol solution in the water bath to the desired temperature. In the first run, the temperature was set at 450C.
4. 12.3 mL of methyl formate was added to the aqueous methanol solution when the temperature reached it thermal equilibrium. The solution was kept stirring constantly. The conductivity was measured after 30 seconds. The solution measured at interval of every 2 minutes until the reading become constant. All data were reported in the Table 1.1.
5. The whole experiment was repeated at the temperature of 550C.
Figure 1.1: Apparatus Set – Up for Hydrolysis Reaction
Data Analysis :
1. All raw data were plotted based on