Scoring in
Chem 120
This is a course that combines lecture and laboratory, and
the scoring reflects your performance on homework
sets, exams and in the
laboratory. Lecture and laboratory performance receive equal weight in setting
your
grade for Chem 120.
Laboratory Reports: 225 points
Scoring of labs is based on pre-determined criteria for accuracy and
precision expected for a given experiment.
The difference between the reported result and the accepted value for
the unknown determines at least
50% of the score for each experiment. Experiments are also scored
on the reported precision when possible,
and the reported results here determine 25% of the score for those
experiments. In three experiments (#4,6,7)
graph quality also affects the score.
Proper calculation of results is important. Miscalculation
of laboratory results will be subject to a penalty of 10% of the score earned.
Punctuality
matters, too: results submitted after the due date and without an approved
excuse will be subject to
a penalty of 2
points per business day late.
Credit will not be given for
any
work submitted after 4:00 PM on 22 May 2008.
Laboratory notebooks will be evaluated for proper recording of
experimental results, presentation of data,
calculations and results,
as well as neatness. Notebook checks will be carried out during the
weeks
indicated.
Expt. No.
|
Points Possible
|
Title of Experiment
|
1
|
25
|
Acid-Base Titration with Computer Analysis
|
2
|
20
|
EDTA Titration of Ca and Mg
|
3
|
20
|
Coulometry
|
4
|
20
|
Iodometric Determination of OCl in Bleach
|
5
|
20
|
Spectroscopic Assay of Aspirin
|
6
|
20
|
Spectroscopic EDTA Titration of Cu |
7
|
20
|
Turbidimetric Analysis of Sulfate in River Water |
8
|
20
|
Two-Component Spectroscopy |
| 9 |
20 |
Spectroscopic Determination of Fe |
| 10 |
20 |
Gas Chromatography |
| 11 |
20 |
Cu by Ion Exchange Chromatography |
Notebook Checks: 25 points
Scoring reflects preparation and performance in the laboratory as
reflected by the presence of expected
information, the answers to pre-lab
assignments and the general organization and neatness of the notebook.
Two checks will be conducted
during the weeks of:
3/24/08 10 pts
5/5/08 15 pts
Lecture: 250 points
Homework
Each week, 8 problems will be assigned, from which 2 are selected and graded. Fully worked solutions (not just answers!) are due to the mailbox or office of your Laboratory TA by no later than 1200 Wednesday of the week following the assignment. Note that the homework solutions will not be graded if fewer than 4 of the 8 assigned problems are submitted or if the assignment is submitted late, without an approved excuse. Each
problem graded counts 4 points toward your homework score. Full
credit is given if a correct solution is provided and partial credit may
be assigned if warranted by the work submitted. The total number of homework
points (there are 96 possible points) is then adjusted to a maximum of 100
points by a scaling factor (100/96).
Mid-term Exams
Scoring here reflects student performance on assigned homework
sets and on three closed-book examinations covering all course
material assigned or due previous to the examination. The
exams include definitions of terms, calculations, short answer questions
and explanations of observations. General formulas, tables of electrochemical potentials and
periodic tables, and all necessary physical constants are provided
with the exam.
Partial credit is given.
The scores from the homework and the three mid-terms are averaged as
indicated below. The average is the added to the quiz score and the
score on the final exam to determine
the points earned in the Chem 120 lecture.
Clicker "Quizzes"
Each week, there will be a series of questions asked in lecture.
You will be expected to repond to these with your "clicker" and
your answers will be tabulated and scored. A score of 50% or higher
on these questions will earn full (100 points) credit. Scores below
50% will receive credit in proportion to the score earned. Thus, a
40% correct scores 80 points.
Final Exam
The final exam in Chem 120 is a 2-hour, "open-page" comprehensive exam
covering the lecture and laboratory work done for the course.
The date and time of this exam will be set in December by the University
Registrar. Up to date information
on dates, times and locations of S08 final exams can be found at http://www.udel.edu/exams .
Students may bring a single 8.5" x 11" page with any
information believed to be helpful for the exam, entered on both sides
of the page. On this exam, statistical
and periodic tables and all necessary physical constants will be provided,
but general formulas will not. Partial credit is given. This exam is
scored from
50 points.
Scoring Summary
Laboratory reports 225
pts
Notebook checks (tentative dates)
week of 22 March 2008 10 pts
week of 5 May 2008 15 pts
Exams (firm dates)
1st Mid-term exam 100 pts
2nd Mid-term exam 100 pts
3rd Mid-term exam 100 pts
Graded
Homework 100
pts
________________________________________________
The average of the above 3: 100
pts maximum
Clicker Questions 100
pts
Final exam xx May 50
pts
_________________________________________________
Total: 500
points maximum
Go to Top of Page
Return
to Chem
120 Home Page
Return to
Chem120 Syllabus
|
