2. Necessary supplies
a. OSHA-approved safety goggles
or glasses with side-shields - mandatory ( do not put them in the drawers).
b. A roll of paper towels per
pair of students, given to the instructor - mandatory.
c. It is recommended that students
have lab coats or aprons.
3. Attendance
Attendance in the lab is mandatory.
No points are awarded for attending the lab with the exception of the three
(3) points the first week (these are NOT bonus points!)
4. Assignments
Lab assignments include:
-prelab questions
-lab report
-postlab questions.
All lab assignments are to be written
in pen
(not the erasable variety) or typed, and must be written in comprehensible
English, using complete sentences, correct spelling and grammar.
The assignments must be legible.
Use of word processor is mandatory for the
students with illegible handwriting ( if the instructor comments that she/he
cannot read student’s handwriting-the student should submit typed assignments
in the future).
Each student must submit a unique lab report.
The group work is allowed in discussing the
problems but each individual must use his/her own style and words
in the report/prelab/postlab.
For the prelabs and postlabs,
complete answers to all questions must be given.
“Complete” means that the explanations,
not just short answers must be included and all calculations
must be shown, wherever applicable.
The lab report consists of :
- a completed data sheet and observations
- data must include units. Observations usually concern noted procedural
deviations and possible error sources.
Data sheet will be initialed
by the instructor before the student leaves the lab every week.
- all pertinent calculations (show all calculations
including formulas) and results - calculations are to be labeled
(label clearly indicating what is calculated) and organized; calculations
must include units
- discussion of the results - state the results
first, then provide possible error sources and discuss their effect
on the final result
The well organized piece of work is
expected.
On occasion, you may be asked to write a
formal report, in which case the format will be outlined differently.
Any questions concerning the assignments should be asked during the week preceding the experiment, not five minutes before the lab. That is why the instructor’s phone number or e-mail is provided in the first session.
Assignment due dates:
The answers to prelab questions are due on
the instructor’s desk on the day of the experiment, before the introductory
talk, which means in the first minutes of the lab session.
Late prelabs
will not be accepted.
The postlab and the report for the previous
week’s experiment are due at the same time as the prelab for the
current experiment (see above).
Reports and postlabs may be turned in one
(1) week late with a loss of 30% of the points.
Reports/postlabs that are more than
one week late will not be accepted.
5. Grading
The pre- and postlab is worth four
(4) points each, unless specified otherwise. The lab report is worth five
(5) points. To be awarded full credit for the report the students must
write an exhaustive discussion of results. If a formal
report is requested, it is worth 10 points.
Unannounced quizzes may be administered
during the semester, before the lab begins.
Final Grades
100-94% = A; 93-90
% = A-; 89-85 % = B+; 84-80% =
B; 79-75% = B-; 74-70% = C+; 69-66 % = C;
65-62% = C-; 61-59 % = D+; 58-54 %=
D; 53-50% = D-; <50%= E
6. Equipment check-in and check-out
Each pair of students in every lab section
will check into the drawers the equipment received at the beginning
of the semester and fill out the standard equipment sheet.
PRINT both names, the lab section
(e.g. Chem 1230-002), the drawer # (e.g. # 14, 14 A) and the lock combination
(e.g. 12-24-36, 14-32-56) on the back of the sheet. Return the sheet and
the lock tags to the instructor.
One equipment sheet will be used for more
than one section.
Each pair of students will use the same equipment
sheet at the end of the semester to check the equipment, then wash
the glassware, replace missing items and return any excess items
to the instructor. The last class to perform the experiment in a given
room this semester will return the equipment to the stockroom.
7. Care of lab equipment
- Each pair of students is assigned two drawers:
top- for the glassware and the bottom one- for the metal
equipment. The drawers and equipment are shared among several lab
sections. It is crucial that the students take good care of the equipment,
clean glassware properly with soap, brush and water,
restock it when broken, and that the drawers are locked after
each lab.
- Do not leave any personal items in
the drawers ( lab coats, goggles, etc.).
- Any additional equipment provided
on the cart each week must be returned to the cart after the experiment
and not placed in the drawer. The additional glassware
must be washed, and thermometers cleaned and turned off.
- The students are required to report to
the lab instructor problems such as broken, missing and dirty glassware,
too many items, metal clamps thrown together
with glass, drawers not locked at the beginning of the lab
session, etc. Two (2) points will be deducted from the score of the pair
of students that used the drawer last.
8. Make-up labs
Please always notify the instructor or lab
coordinator in advance if you will not be able to attend the lab.
Following proper notification, you may be allowed to perform
the missed experiment with another lab section that week, subject
to space availability . Your postlab, report and prelab is due in
that lab, with your lab section and your instructor’s name written
next to yours. The make up instructor will submit it to the instructor
of your section. Your data sheet must be initialed by this instructor before
you leave the lab or you will not be granted any credit. The last
week of labs is scheduled for make up lab for the students who had one
absence (illness, unavoidable business trip or a documented
jury duty). The lab that may not be made up is the first meeting
in the semester.