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ORGANIC CHEMISTRY LABORATORY CHEM 2521

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ORGANIC CHEMISTRY LABORATORY CHEM 2521 (before check in) Teaching Assistant e-mail: _at_d.umn.edu Office hours: (SSB 121) course page: http://www.d.umn.edu/~vzhdanki ... – PowerPoint PPT presentation

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Title: ORGANIC CHEMISTRY LABORATORY CHEM 2521


1
ORGANIC CHEMISTRY LABORATORYCHEM 2521
  • (before check in)

2
Teaching Assistante-mail _at_d.umn.eduOffice
hours (SSB 121)course pagehttp//www.d.umn.ed
u/vzhdanki/2521/
3
LABORATORY CHECK IN
  • You must have a U Card with a balance of at least
    25 in your account before you are allowed to
    check into the lab.
  • This will cover your purchase of goggles and
    hopefully any breakage that occurs during the
    semester.
  • You will not be allowed to work in lab unless you
    are registered for the course and have checked
    into lab.

4
LABORATORY CHECK OUT
  • You will check out of lab at end of semester
    during your lab section.
  • Check out includes cleaning and accounting for
    the equipment in your drawer when you checked in.
  • You must pay for any missing or broken equipment
    and turn in key.
  • Failure to check out results in 45 charge which
    includes 20 for key.

5
SYLLABUS (Students follow along in their own
syllabus.)
  • LABORATORY MATERIALS
  • Macroscale and Microscale Organic Experiments 5th
    Edition by Williamson/ Minard/ Masters
  • Safety Goggles
  • Bound Laboratory Book

6
LAB MAKE-UP POLICY
  • Lab may be made up during the week the experiment
    is missed or the following week.
  • No exceptions to this policy.
  • Student must see TA to schedule a make-up lab.
  • This must be done at least 24 hours before a
    scheduled lab make-up.

7
LAB RULES
  • All accidents medical problems must be reported
    to teaching assistant (TA).
  • No one may work in lab without TA.
  • You will be issued a drawer and are responsible
    for contents, key and any other equipment used.
  • You will check out of lab at end of semester and
    must pay for broken or lost equipment and key.
  • You must have a bound laboratory notebook
  • You MUST wear fully enclosing goggles (no
    glasses). If you forget your goggles you can rent
    them from the stockroom, the 1st time is free, it
    is .50 after that
  • Do not wear shorts, sandals, or nylon type pants.
    These offer little protection against chemicals
    in the event of an accident.
  • Place bags, coats on shelves or designated
    areas.
  • Do NOT eat or drink in the lab.
  • Wash hands before you leave the lab. Especially
    before eating.

8
LAB RULES
  • Safety, Safety, Safety
  • Goggles must be worn at all times after pre-lab
    and before post-lab work.
  • KEEP A CLEAN AND ORDERLY LAB. Points will be
    deducted from you and your partners lab grade if
    your hood is not left clean and picked up.

9
LAB NOTEBOOK
  • Notebook musts
  • Use a pen (NO PENCIL)
  • Draw a single line through a mistake. Do not
    scribble or use whiteout
  • Keep the notebook in column format.
  • Write on one side of the page
  • Make sure the procedure is completed before the
    lab starts. (this will be checked)

10
The Notebook Must Contain(follow lab syllabus)
  • I. Title and date should be at the top of every
    lab.
  • II. Reaction scheme should be below the title.
  • III. Put the reference below the reaction scheme
    Williamson, Macroscale Microscale
    OrganicExperiments, pp. (fill in the page numbers
    used in the book!).
  • IV. Lab partner(s)
  • V. Procedure (MUST be written in your own
    words!)
  • 1. Should take up 2/3 of the left side of the
    page.
  • 2. You should be able to use this and not your
    book.
  • 3. If the book tells you a figure to use, draw it
    in the lab notebook.
  • VI. Observations (very important these can tell
    you if the reaction works or not)
  • 1. Put to the right of the procedure, when it
    occurs.
  • 2. Write down EVERYTHING you notice. Color
    changes, precip. formation, all
  • weights, starting weight, end weights, boiling
    point, melting point, etc.
  • 3. If you forget to put the lab changes in the
    procedure put them in the observations.
  • 4. Do not write a paragraph of observations.

11
The Notebook Must Contain
  • VII. Results (If you can put the data in tabular
    format do it, NO paragraphs)
  • 1. Put starting and ending weights of starting
    material and product here.
  • 2. Show all calculations used, i.e. theoretical
    yield and percent yield.
  • 3. State melting points and boiling points here.
  • VIII. Discussion (Tells if you understood the
    lab)
  • 1. Do NOT rewrite the procedure here
  • 2. Write in paragraph form.
  • 3. Discuss about the results. Compare literature
    values with your experimental values.
  • 4. Discuss yield. Is it low, high and why?
  • 5. If something went wrong in the lab for you
    state what happened and why. Did you
  • forget a step, etc?
  • 6. If you were to repeat this lab what would you
    change?
  • IX. You must have a table of contents and number
    each page! Do not rip out pages in the notebook!

12
The Notebook Must Contain
13
How are points taken off?
  • 1. Not prepared for the lab.
  • 2. Do not participate in the lab (have your
    partner do all of the work)
  • 3. Poor laboratory skills.
  • 4. Everything stated above you need. If it is
    minimal or not completed points will be taken
    away.
  • 5. No unknown
  • 6. Wrong unknown
  • 8. Incorrect calculations or no calculations
    shown.
  • Point values are the TAs decision.

14
NEXT
  • A) Safety Video
  • B) Check into lab
  • C) Check-In
  • 1. Find a partner and get drawer from TA
  • 2. Go to stockroom and obtain drawer key.
  • 3. Open drawer and make sure you have everything.
    If not, get it from the stockroom. If you dont
    have it at the end of the semester you will be
    charged for it.
  • 4. When you have everything, keep the key and
    return the check-in slip to the stockroom.

15
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