CHE 233 FINAL EXAM WITH COMPLETE ANSWERS { GRADED A+}

CHE 233 FINAL EXAM WITH COMPLETE

ANSWERS { GRADED A+}




have one (or more) C=C bonds - ✔✔unsaturated fatty acids


have no C=C bonds - ✔✔saturated fatty acids


What are the ways that biodiesel is produced commercially? - ✔✔1.

Base-catalyzed transesterification of the oil with methanol (approach

we will use)

2. Acid-catalyzed esterification of the oil with methanol

3.Saponification of the oil to yield free fatty acids, followed by acid

catalyzed esterification

What is the prominent method to produce biodiesel commercially? -

✔✔Base-catalyzed transesterification

, FAMEs - ✔✔Fatty Acid Methyl Esters


Limiting reagent in biodiesel experiment - ✔✔Triglyceride


XS reagent in biodiesel experiment - ✔✔Methanol


What shifts equilibrium to the right in biodiesel experiment? - ✔✔xs

methanol


Water + Sodium methoxide produces - ✔✔Sodium hydroxide &

methanol

How is the product in biodiesel experiment characterized?


What differences are you looking for? - ✔✔1H-NMR of FAME


single prominent peak due to methoxy proton

disappearance of multiplet peaks due to triglyceride protons

How is Le-Chatelier's principle applicable to the transesterification

reaction in the preparation of FAMEs? - ✔✔Proves that using xs alcohol