241 lab syllabus-revised notebooks

8/14/2019 241 Lab Syllabus-revised Notebooks

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CHML 241

Organic Chemistry I Lab

Spring 2010, Tues 11:30 2:20

Instructor: Dr. K. Troy Milliken

Office: 122 JAP (take elevator to 1st floor, walk straight ahead to room 122, enter and turn left.My office will be the door on your left). If the outside door is shut, knockloudly so I can hearyou. 11-12 M-F

Phone: 979-2213 (o), 724-466-6616 (cell)

Email: [email protected]

Prerequisites: The student must have passed CHM 142 and CHML 142, and have already taken

or is currently taking CHM 241.

Textbook: Catalyst, by Prentice Hall (Organic lab 241 & 242).

Safety Goggles: The student must own a pair of safety goggles and bring them to lab each week.

The safety goggles must be worn as soon as the lab begins. This policy will be strictly enforced.

Cell phones: All cell phones must be turned off. Points will be deducted if used.

Methods of Evaluation:

Students will be evaluated based on their lab reports and exams. Each lab will count as 100 pts.

Each exam (midterm and final) will count as 200 pts. The lowest lab report grade will be

dropped.

lab reports: 11 x 100 = 1100midterm exam: 1 x 200 = 200

final exam: 1 x 200 = 200

1500 pts

Grades will be assigned according to the percentage of points received:

A = 100-90 %

B = 89-80 %

C = 79-70 %

D = 69-60 %

F = 59-0 %

If the student does not turn in a lab report, it will count as the dropped lab report. Any additionalwill count as zeros. Any missed lab will count as a zero for the lab report.

The American Disability Act (ADA):It is the university policy to provide, on a flexible and individualized basis, reasonableaccommodations to students who have disabilities that may affect their ability toparticipate in course activities or to meet course requirements. Students with disabilitiesare encouraged to contact their instructors to discuss their individual needs foraccommodations.
mailto:[email protected]:[email protected]


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241 Lab Order, Spring 2010

Week of:

Jan 19 Check-in and safety video

Jan 26 Distillation (Simple-50/50 ethanol water mixture)Feb 2 Distillation (Fractional -50/50 ethanol water mixture)

Feb 9 Distillation (Packed column-50/50 ethanol water mixture)Feb 16 Molecular Model Exercise I (cyclohexane models)

Feb 23 Extraction (Panecetin mixture)

Mar 2 Molecular Model Exercise II (stereochemistry models)

Mar 9 Midterm Exam

Mar 16 Spring Break

Mar 23 Melting Point Lab

Mar 30 Mixed Melting Point

Apr 6 Recrystallization and Melting Point

Apr 13 Thin Layer Chromatography

Apr 20 SN2 reaction with sodium saccharin

Apr 27 Final Exam and Check-out

Lab Notebooks

The student will write all information in their notebook. This information includes prelab notes,

lab procedure, observations, results, and conclusions. The student will only write on the frontside of a page, not the backside. The student will number their pages and keep a Table of

Contents on the first page. The lab notebook is to be a hard bound composition book. No spiral-

bound or pull out sheets allowed. Any noncompliance to the above will result in point deduction.

For each new experiment, the student shall write the name of the experiment at top of page, the

date, and the time. The student must get the instructors initials on the front page after

completing the lab.

The student will write a heading for each section of the lab and underline it before beginning to

write. The first heading will be Pre-Lab Notes, then Lab Procedure, then Observations, then

Results, then Conclusions.

The instructor will present in-depth notes on each experiment. The student will be on time to lab

to make sure they get all the notes. These notes will be critical for exams.

The lab procedure will come from the lab book or a handout. The student will write step by step

what they have done.

Observations are any color change, temperature change, or any other physical change thats

observed during the experiment.

Results are boiling points, melting points, Rf values, etc that are recorded during the lab.


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The conclusion section is to be written after the lab period. This section is very important, and

worth the majority of points. The student must think about the results obtained and correlate with

theory as presented in pre-lab notes. The student must discuss the theory and how it correlates

with the results obtained. The student must write what the results mean. The student will avoid

terms like I feel or I wish or I hope. Avoid this lab was not a success. Each lab is asuccess to some degree, as knowledge is attained. Write what you learned from the lab.

An Example of a Good Conclusion:

The reaction of t-butyl alcohol with HCl went as expected. The pH of the reaction solution

decreased over time, showing that HCl was being consumed in the reaction. The OH band

diminished in IR, showing that the alcohol was being converted to the alkyl chloride. The

reason for the conversion was due to the formation of a good leaving group, water. H2O was

formed upon protonation of the t-butyl alcohol with HCl. An SN1 cleavage occurred, creating

the t-butyl carbocation, which is stable since it is tertiary. The chloride ion then attacked the

carbocation to yield the expected product of t-butyl chloride. This experiment showed that

the SN1 reaction can take place if a good leaving group is attached to a tertiary carbon.

CHM 241 Lab Objectives1. To familiarize students with different aspects of safety: gloves,

goggles, and proper dress apparel.

2. To familiarize students with the use of the hood.

3. To have students assemble a simple, fractional, and packed-columndistillation, and compare their separation capacities.

4. To familiarize students with the concept of theoretical plates.

5. To have students perform extraction using a separation funnel.

6. To have students assemble and use a suction filtration device withaspirator.

7. To have students work with model kits in a facile manner to analyzesubstituted cyclohexanes and stereoisomers.

8. To have students learn recrystallization technique and properlymeasure a solids melting point.

9. To teach students factors affecting melting point of a solid and thetheory of recrystallization.

10.To have students perform an SN2 reaction and determine if correct

product was formed using melting point.

11.To have students perform an elimination reaction of cyclohexanol anddetermine qualitatively if correct product was formed.

12.To teach students the theory of Thin Layer Chromotography.

13.To have students perform Thin Layer Chromotography to identifyunknowns.


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241 lab syllabus-revised notebooks

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