Department of Chemistry
& Biochemistry
This laboratory course should be taken with CHM235, the respective co- or pre-requisite. The lab focuses on synthesis, purification, and identification of organic compounds using reflux, distillation, liquid-liquid extraction, recrystallization, chromatography, IR spectroscopy, melting point analysis, and other techniques.
REQUIRED MATERIALS: Manual for General Organic Chemistry I Laboratory - CHM 235L (Available on the Instructional Laboratory Homepage at: http://jan.ucc.nau.edu/~jkn/Labs.html) Click on the CHM235L link to get to the lab manual material. Printed versions are available at the chemistry office (20-125) for $10 updated 6/2014. Laboratory notebook (National 53-108, bound, 5x5 grid) and indirectly vented or non-vented goggles are available at the NAU bookstore. These must be purchased before the second lab meeting. A lab coat or apron is recommended but not required.
SAFETY, INTRODUCTORY EXERCISES, AND LAB PERFORMANCE CONTRACT: The hazards encountered in CHM235L are significantly higher than in CHM 151L and 152L. Read the lab manual introduction! You must be aware of safety hazards associated with each experiment before you begin work and do a risk assessment. Prior to lab, read the experiment and MSDS safety information on hazardous chemicals and review before starting each experiment. The safety and introductory exercises (handed out on the first day of lab) must be completed, signed, and turned in to your TA along with a “Lab Performance Contract” before being allowed to start experimental work. Students with known conditions (i.e. respiratory problems, allergies, pregnancy, etc.) must consult the instructor, TA or lab manager for special precautions.
LAB PERFORMANCE: Points will be taken off for safety infractions, poor technique and chemical hygiene (10 points per meeting period). These issues are specified in the “Lab Performance Contract". Read and complete this contract carefully. Extra credit points may be given for excellent lab performance and above-and-beyond work, like cleaning community areas at your instructor’s discretion.
LATE WORK IS PENALIZED 10 POINTS EACH DAY, (weekends count as 1 day). Late work will NOT be accepted after the 3rd day late. Exceptions will be made only if a written doctor's or institutional excuse is provided. Turn in work directly to your TA when due (see the schedule on the next page). Chemical products and unknown report sheets are due at the end of the period noted on the schedule. Quizzes will be conducted at the start of lab without the ability to be made up. Lab notebooks are turned in directly to your TA at the end of the period in which they are due. Late unknown report sheets, and notebooks may be turned in at the lab prep stockroom (216). Your name, Dana ID#, class number (CHM235L), and section letter must be on the front of all items. The TA or instructor is expected to return graded material at the start of the next meeting period or within a reasonable timeframe.
Attendance is required and you must complete all labs during the week in which they are scheduled. Labs missed for legitimate reasons (e.g. trips sponsored by the university) will be allowed to be conducted during the week it is scheduled only if the instructor or TA was notified before the absence. Make up labs will not be offered at the end of the semester. If more than one lab is missed due to legitimate reasons, a letter grade of “I” (Incomplete) will be given. Please note that a medical or dental appointment is not an acceptable reason for missing a lab except in case of an emergency. In case of an emergency, you must provide written proof of for any absence (e.g. a signed note from a physician).
Tardiness: Because the full laboratory period is needed for completion of most experiments and laboratory safety information is disseminated in the first few minutes of the class period, it is unacceptable to be late to lab. Students who are late will lose laboratory performance points for that experiment, in addition to penalties accrued for late submission of laboratory assignments. Arriving 15 minutes or more late to lab, and/or repeat occurrences of lateness, may constitute an unexcused absence – a zero grade will be given for lab performance, with no opportunity for rescheduling.
Academic Dishonesty: The Department of Chemistry and Biochemistry strictly enforces the University’s policy on academic dishonesty. Sanctions imposed for academic dishonesty include receiving zero credit on the assignment in question without the chance to improve the grade, receiving a failing grade for the course, or expulsion from the University. Using another student’s unknown, unknown #, data, or results is academic dishonesty. Repeat cases of academic dishonesty will have increasingly severe consequences (department and University records will be kept and referenced). The most common form of academic dishonesty observed in this course is plagiarism by using some or all of another student’s information/work on a laboratory report as part of your own work. Working with your classmates is encouraged, however submitting identical or near work is frowned upon. Make the effort to be creative, even if you are trying to report identical information. If you use information from a source, such as the lab manual, a citation is in order; otherwise it will be considered plagiarism.
LABORATORY NOTEBOOKS: Accurate data collection and record keeping is a major objective of this course. A bound laboratory notebook must be used to generate an original and permanent record of all observations, data collected, calculations, and error analysis. Data must be written immediately and directly into the notebook. You will be penalized 5 points every time you record data or observations in places other than your notebook, such as a paper towel. Immediately tape or glue computer-generated graphs into the notebook. Do NOT take lab lecture notes in the notebook. You should briefly outline the experimental procedure in your laboratory notebook to prepare for an experiment. A detailed description of how to keep a notebook is in the laboratory manual introduction. Include an error analysis in your laboratory notebook, at the end of records for an experiment. At the start of every lab period while preparing for an experiment, you should have your lab book opened to that experiment being conducted; your instructor or TA will walk throughout the lab making sure all students are thoroughly prepared by outlining the procedure without exact quantities. Ten points will be deducted from your total laboratory performance points each time your notebook is not prepared with a procedural outline before you conduct that days experiment. The first two incidences for lack of a procedural preparation you will be asked to work closely with a partner with a penalty of reduced lab performance points. You will not be allowed to conduct that days experiment on the third violation with no chance to make-up the experiment. Notebooks will be graded for format and content three times during the semester. Notebooks must be turned in at the end of the lab which you are regularly scheduled.
UNKNOWNS: Unknown sheets are turned in directly to your TA at the end of the lab period. Ten points will be deducted for late, re-graded, repeats of unknowns, or writing the wrong unknown number. Unknowns needing reevaluation can be turned into the main chemistry stockroom including: Section letter, TA name and time stamp.
Prelab Work and Quizzes: After reading the experiment, the pre-lab questions found near the end of each experiment, should be completed before starting lab work. Loncapa previous-post-lab & pre-lab questions must be done before starting an experiment. All portions of Loncapa will be available at the start of the semester and due before the start of the regular lab period for which you are registered. A mandatory pre-lab quiz is given at the start of each experiment (see schedule, makeups not available) which will consist of about five questions similar to the pre-lab questions at the end of each experiment and in the Loncapa module for that experiment. In addition, questions on MSDS material or risk assessment could be on any quiz. The purpose of the quizzes and outlines is to encourage you to study the experiment & prepare before you conduct an experiment.
Grading: The assignment of course points will be done as follows: (Check grades at: http://jan.ucc.nau.edu/~jkn/Labs.html)
The Add/drop deadline is Thursday, January 22nd. After this time withdrawing from the course will result in a W (will show up on your transcript) as well as a $25 fine. The WITHDRAWAL DEADLINE is Friday, March 13th. After this time you will not be able to withdraw from the course except in extraordinary circumstances.
# |
Graded Area |
Points |
Grading Scale |
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1 |
Melting Points (MP) – Unknown |
50 |
Percent of Total Points |
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2 |
Distillation and Gas Chromatography |
A - 90% (900-1000 pts) |
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3 |
Organic Sep. & ID (ID) – Unknown: Organic acid (50), neutral (50) |
100 |
B - 80% (800-899 pts) |
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5 |
Synthesis: Menthene (CY) - Purity/Yield |
50 |
C - 70% (700-799 pts) |
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7 |
Analysis Using TLC – Unknown |
60 |
D - 60% (600-699 pts) |
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Pre-lab Quizzes (7 x 20 pts) |
140 |
F - <60% (<600 pts) |
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Prelab work (Loncapa) |
100 |
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Notebook Grading: 1st (40 pts), 2nd (80 pts), 3rd (80 pts) |
200 |
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Lab Performance (10 pts per meeting period) |
100 |
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Laboratory Final Exam |
200 |
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TOTAL POINTS POSSIBLE |
1000 |
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Section Letter |
Day |
Time |
Room |
Instructor/Office #/Phone |
Teaching Assistant |
Email Address |
A |
T |
8:30-11:30am |
209 |
Mercer/20-133/32450 |
Warrington, Nicole |
nvw3@nau.edu |
B |
T |
1:50-4:50 |
209 |
Mercer/20-133/32450 |
Macario, Lisa |
lmm335@nau.edu |
C |
T |
5:30-8:30 |
209 |
Mercer/20-133/32450 |
no TA |
Steven.Mercer@nau.edu |
K |
T |
5:30-8:30 |
205 |
Mercer/20-133/32450 |
Unger, Jeremy |
jnu5@nau.edu |
D |
W |
2:20-5:20 |
209 |
Mercer/20-133/32450 |
Zapalova, Aleksandra (Sasha) |
ayz3@nau.edu |
E |
W |
5:30-8:30 |
209 |
Denzer/20-116/32054 |
Bui, John |
jb2345@nau.edu |
F |
W |
5:30-8:30 |
205 |
Denzer/20-116/32054 |
no TA |
Dara.Denzer@nau.edu |
G |
Th |
8:30-11:30am |
209 |
Denzer/20-116/32054 |
Warrington, Nicole |
nvw3@nau.edu |
H |
Th |
1:50-4:50 |
209 |
Denzer/20-116/32054 |
Unger, Jeremy |
jnu5@nau.edu |
I |
Th |
5:30-8:30 |
209 |
Denzer/20-116/32054 |
Clark, Danielle |
drc273@nau.edu |
L |
Th |
5:30-8:30 |
205 |
Denzer/20-116/32054 |
Koller, Kristopher |
kk668@nau.edu |
Starting Dates for Experiments and Due Dates by lab section letter (Note that assignments due are bolded): |
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Tu |
W |
Th |
Experiments: (All quizzes will be given at the start of the lab period on the dates below). |
Loncapa (LC) Due at 11pm on the day before starting an experiment. |
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A,B,C,K |
D,E,F |
H,I,L |
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13-Jan |
14-Jan |
15-Jan |
Lecture on Syllabus, Safety Exercise, Intro to Instructional Labs web-site, Intro Exercise, Lab Performance Contract & MSDS Certificate |
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20-Jan |
21-Jan |
22-Jan |
Exp.1: Melting Points |
Quiz 1, Intro. Exercise Due at start of the period (10 pts on Quiz 1). Exp.1 Unknown sheet and Laboratory notebook due at end of lab period. |
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27-Jan |
28-Jan |
29-Jan |
Exp.2: Simple Distillation (see appendix for diagrams and videos for assembling) & Gas Chromatography |
Quiz 2; Loncapa Module Exp 1 & 2 Due |
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3-Feb |
4-Feb |
5-Feb |
Exp.3: Separation & Identification of Organic Compounds (day 1) |
Quiz 3; Loncapa Module Exp 3 & 2 Due |
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10-Feb |
11-Feb |
12-Feb |
Exp.3: Identification (day 2) |
Exp.3 Unknown Report Sheet due at end of lab period. |
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17-Feb |
18-Feb |
19-Feb |
Exp.4: Ester Synthesis (day 1) |
Quiz 4; Loncapa Module Exp 4 & 3 Due |
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24-Feb |
25-Feb |
26-Feb |
Continue Exp. 4 (day 2) |
Laboratory notebook due at end of lab period. |
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3-Mar |
4-Mar |
5-Mar |
Exp.5: Menthene synthesis by alcohol dehydration (day 1) |
Quiz 5; Loncapa Module Exp 5 & 4 Due. Crude product for Exp. 5 due at the end of the lab period. |
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10-Mar |
11-Mar |
12-Mar |
Continue Exp.5: (day 2) |
Quiz 5; Loncapa Module Exp 5 & 4 Due. Pure product for Exp. 5 due at the end of the lab period. |
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17-Mar |
18-Mar |
19-Mar |
Spring Break: Lab Does not meet |
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24-Mar |
25-Mar |
26-Mar |
Exp.6: Reaction Mechanism |
Quiz 6; Loncapa Module Exp 6 & 5 Due. |
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31-Mar |
1-Apr |
2-Apr |
Exp.7: Analysis Using TLC |
Quiz 7; Loncapa Module Exp 7 & 6 Due; Exp. 7 Unknown Report Sheet and Laboratory notebook due at the end of the lab period. |
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7-Apr |
8-Apr |
9-Apr |
Final exam review |
Loncapa Module Exp 7 & Post Due. Final Deadline for all work. Nothing accepted after 8:30 pm |
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14-Apr |
15-Apr |
16-Apr |
Written Comprehensive Final Exam |
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21-Apr |
22-Apr |
23-Apr |
Lab Does not meet |
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28-Apr |
29-Apr |
30-Apr |
Check grades with TA and go over final |
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