List of Experiments Chemistry 315 SUMMER, 2010

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                   CHEM 315-2A3   Summer 2010 Syllabus - Laboratory Report Schedule

                                               

                        Instructor: Dr. Keith Davies                          Office Hours: T/W/Th 1:30-2:30      

                        Office:         331 ST1                                       703-993-1075     kdavies@gmu.edu

                       410 Occoquan (PW)                                         http://mason.gmu.edu/~kdavies/

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                        Date                            Experiment                                                    Report Due Date

 

                        Tu. May 18                  Check-in, Safety Film

 

                        W. May 19                  Melting Point / Refractive Index                    Tues. May 25

 

                        Th. May 20                  Recrystallization                                             Wed. May 26

 

                        Tu. May 25                  IR, MS, UV Spectroscopy                             

 

                        W. May 26                  IR Unknown. B.P (Simple Distilation)           Tues. June 1

                       

                        Th. May 27                  Gas Chromatography: Acetates                      Wed. June 2  

 

                        Tu. June 1                    Distillation of Mixture                                    Thurs. June 3              

                       

                        W. June 2                    Gas Chromatography of Distillate                  Tues. June 8        

 

                        Th. June 3                    Synthesis t-butyl chloride                               Wed. June 9          

 

                        Tu. June 8                    Qualitative Organic Analysis               

 

                        W. June 9                    Qualitative Analysis, Cont.                             Thurs. June 10

 

                        Th. June 10                  Lab Check out

                        Lab Final (Cumulative)

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Laboratory Techniques

In CHEM 315, you will be introduced to techniques commonly used in the organic chemistry laboratory, and you will use these techniques in subsequent experiments to enable you to purify, characterize and identify unknown compounds. 

 

§  Melting point determination

§  Boiling point determination

• Refractive Index

§  Recrystallization

• Distillation

§  Infra Red Spectroscopy

§  UV Spectroscopy

§  Mass Spectrometry

§  Qualitative analysis of functional groups

§  Synthetic techniques

 

Class Preparation

·         Attendance is required at each lab class. During the summer sessions, CHEM 315 labs run continuously from 8:00 a.m. to 10:00 p.m. so it will not be possible to make-up labs missed..

·         You are expected to come to class prepared for each day’s experiment by reading ahead the assigned material indicated on the syllabus. This will prepare you for the lab quiz, given before each class, and will enable you to perform the experiments more efficiently and more safely. It is important to be on-time for each class, as you will not be allowed to make-up any quizzes that you will miss if you arrive late.

·         There will be a pre-lab lecture given during the first hour that will cover the theory behind the experiment and explain the techniques and procedures to be used in the lab each day. The material covered during the pre-lab lecture is potential material for the lab final exam.

·         During the lab itself, you must pay attention to any additional announcements  and carefully follow any modifications to the laboratory procedure that it may be necessary to make. Since most chemicals are potentially toxic if not handled properly, students are expected to be familiar with the chemicals they will be using each day and what hazards, if any, are associated with them.

 

 

Lab Policies:

 

Safety first. Use safety glasses at all times. Sandals and shorts are not allowed in lab.

Broken glass should be disposed of in the broken glass container. Chemical waste should be placed only in waste disposal bottles in the hood.

Return community apparatus to the appropriate location.

Unknown samples received for analysis are to be exchanged with empty vials from your drawer, when so instructed.

Clean your work area and common work areas before leaving lab.

Make a detailed record of your work in the lab notebook. Submit the colored copy of the lab report to the instructor at the end of the lab period.

Return keys to the keyboard at the end of each lab period.

There are no MAKE-UP labs.

 

 

Notebooks and Lab Reports

 

Laboratory Notebook.  Everyone is required to purchase a laboratory notebook with alternating colored and pre-numbered pages. Copies of all entries made in the notebook will be collected at the end of each lab period. Please follow the notebook procedure described in the laboratory manual (pp. 7-11). Note that the title, reference, and purpose should be completed before coming to lab so that you are prepared. The notebook is where you record exactly what you do in the laboratory each day. You should outline (concisely) what was done during each step, and record all data collected directly in your notebook as you obtain it. All measurements (weighings, melting points, refractive indexes, temperatures...) should be recorded. Keep your entries well spaced and the notebook organized.

 

Laboratory Report. Written lab reports will be required for each lab. They should be typed and should be handed in at the beginning of the lab period on the date indicated in the laboratory class schedule. Late reports are not accepted. Anything received after the beginning of the lab period will be considered late and marked down 20% if received late on the same day and 50 % if received on a later day. The laboratory report is the largest significant component of the CHEM 315 grade.  Through the report, you will be graded on your ability to communicate the results of the experiments carried out in the lab in an organized and scientifically correct manner. The report is graded not only on the results obtained but also on organization, and presentation.   

The complete lab report should contain four sections.

 

 1. Report Form: It should be placed at the beginning of the lab report. It is a summary of your findings and should be filled out when the experiment has been completed and not during the lab itself. The report forms are found in the back of the laboratory manual. When required, the report should contain references for literature values of physical properties such as boiling points, refractive index and density.

 

2. Introduction: A concise description, in one or two paragraphs, of the purpose of the experiment. It should summarize relevant information taken from the lab manual and the textbook, in your own words. 

3. Results: A brief outline of the experimental procedure, including any changes from those given in the lab manual. It should be written in the past tense (i.e. 20 mL of ethanol was added… not add 20 mL of ethanol.) It should contain a summary of all results obtained, with data organized in tables where possible. The results section should contain any relevant equations, molecular structures and any graphs. All spectra obtained should be attached.

 

4. Discussion and Conclusions: A concise summary of the experimental results and arguments supporting any conclusions made. Possible explanations of low yields and discrepancies between theoretical and experimental determined values should be given. Possible sources of error should be indicated.

 

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Grading:       Lab Quizzes:                            15%                

Spectroscopy Problem Set         5%                 

Notebook                                10%

Lab Reports                             50%

                        Lab Final                                 20%

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Schedule of Experiments
	Tu	W	Th
	May 18   Check-In	May 19  M.P./ R.I.	May 20  Recrystallization
Memorial Day	May 25  IR/UV/MS Problem Set	May 26 IR-cont. Simple Distillation	May 27 G.C. of Acetates
	June 1 Distillation of Mixture	June 2 G.C. Distillates	June 3 t-But-Cl
	June 8 Qual-I	June 9 Qual-II	June 10 Check-out/Final

 

Lab Report Due Dates
	Tu	W	Th
	May 18	May 19	May 20
Memorial Day	May 25 M.P./ R.I.	May 26 Recrystallization	May 27
	June 1 I.R. Unknown	June2 G.C. Acetates	June 3 Distillation
	June 8 G.C. Distillates	June 9 t-But-Cl	June 10 Qual I/II