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Chemistry Supercritical Extraction Lab Essay Assignment
There are two parts of assignments:
Post-Lab Report assignment (Experiment 4). It will not take more than one hour to complete it
You already do the pre-lab assignment (Experiment 4) for me last week. So, it’ll be easy for you to do the post-lab report. Also, I’ll upload a picture of the data and some information to complete this post-lab report assignment. I’ll upload to you the pre-lab report (Experiment 4) to check it and make it easy for you.
Please read the instructions carefully for this assignment because it’s important and make sure you do exactly what it says in the instructions and mention everything is needed on it.
Post- Lab Report (Experiment 4)
What are terpenoids? What are the different types of terpenoids? What is D-limonene and to
which type of terpenoids does it belong? 1 pt
Describe chirality, polarimetry, optical rotation, enantiometric excess (ee). 1 pt
Describe and discuss liquid CO2 extraction technique. 1 pt
Discuss the different benefits of using liquid CO2 extraction as compared to the traditional steam
distillation technique in isolating D-limonene from orange peels. 3 pts
Is the summary of the experimental procedure in a form of a flow chart? 1 pt
Are the main procedural steps for isolation of D-limonene clearly shown in a form of flow chart?
Is the section written as the student have done in the lab video? 1 pt
Table of Chemicals
Are all chemicals used listed? 2 pts
Are all physical properties listed? 1 pt
Are all chemical properties listed? 1 pt
Is the table clearly showing the mass, odor, percentage yield, optical rotation, specific rotation,
ee, refractive index of D-limonene? 4 pts
Show clearly how to calculate the percentage yield, specific rotation, ee, refractive index of D-
limonene. 4 pts
Discuss the benefits you have observed in the extraction of D-limonene in this experiment. 1.5
Compare the method you did in this experiment with the traditional steam distillation in terms of
safety, minimizing waste and energy consumption .1.5 pts
Discuss the optical rotation and specific rotation. Did you get what you expected? 2 pts
Discuss the ee of the isolated D-limonene. Provide an acceptable explanation if you got an ee
that exceeds 100% or an ee that is lower than 80%. 1.5 pts
Discuss the refractive index of D-limonene and compare it with the literature value. Provide an
acceptable reason if this value is different from the literature value. 1.5 pts
Are the theoretical background and the results you got connected? If yes/no why and how? 1 pt
What does the experimental data reveal? 1 pt
Discuss how the techniques performed in this experiment can be applied to other situations? 1 pt
Did the experiment accomplish what it set out to do? 1 pt
3 Reference – 1 pt
Proper citations format – 1 pt
Are all sections labeled? 1 pt
Are proper font and spacing as shown in the lab manual used? 1 pt
Is proper scientific language used? Is overall format attractive? 1 pt
Pre-Lab Report (Experiment 5)
Very simple assignment, please read the instructions carefully to know what you should do.
This assignment is very easy, and it will not take more than half-hour to complete it after you watch the video to know what you need to do. So please try your best to do it.
I posted a link for the video; you have to watch the video carefully to get all information needed in the pre-lab assignment. Please don’t forget to collect the data when you watch the video if it’s required.
Also, please make sure you follow the pre-lab rubric file I’ve uploaded here. In addition, please make sure you write your own words when you fill the information in the pre-lab assignment.
If there is anything you need for this assignment or you don’t understand something in the instructions, please feel free to ask me.
This is the link for the video
I post the link for the video, and I think now you can watch the video it doesn’t open with you please let me know. Please don’t forget to follow the pre-lab rubric.
I’ll upload the pre-lab rubric to let you see it and make sure that includes everything that is needed on it.
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