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CHEM 12B
NAME_________________________
PARTNER’S NAME_________________________
FOOTHILL COLLEGE
FISCHER ESTERIFICATION SUMMARY
1) Complete the following Data Table
DATA TABLE I
EQUILIBRIUM MIXTURE
UNKNOWN #
Retention time (min)
chart speed = 3 cm/min
Identity
Area (mm2)
Identity
Area (mm2)
GC PEAK #1
GC PEAK #2
DATA II
EQUIVOLUME MIXTURE
Retention time (min)
chart speed = 3 cm/min
GC PEAK #1
GC PEAK #2
2) Attach a copy of the peak enhancement GC trace. How does it determine the Identity
of each peak?
3) Attach a copy of the Equivolume Mixture GC trace. Use it to complete Data Table II.
Calculate the Response factor ration fester/falcohol using this data. Show all your work:
CHEM 12B
FOOTHILL COLLEGE
NAME_________________________
PARTNER’S NAME_________________________
4) Calculate the equilibrium concentration of Ester to Alcohol using the response factor
ratio calculated above along with your data in Data Table I. Show all your work:
5) Calculate the Equilibrium constant for ester formation at 25°C using your
concentration ratio from step (3) above.
6) Calculate the Equilbrium Constant for ester formation from your 1H NMR data. How
well does this number compare to the number you obtained via GC? Show your work,
and attach a copy of your NMR spectrum.
7) The average reported in the literature for simple primary alcohols is Keq ROHEster =
4.0. How does your number compare?
8) Reflect on your experiment and tell what you might do differently and/or look out for
if your were to repeat the experiment.