Hours: W - 1:25 - 4:30, Room F702
Ronald L. Drisko, Ph.D.
Office F512 Office Hours:
MWF - 9:00 – 10:00 a.m.
M - 11:15 a.m.- 12:15 p.m.
T,R – 9:00 - 9:30 a.m
Phone: (443) 840-1478
Email: Rdrisko@ccbcmd.edu
Overall Course Objectives
1. use computers to gather and analyze data and/or to perform
calculations;
2. use laboratory equipment and instruments appropriately;
3. use spectroscopic techniques for quantitative analysis;
4. measure colligative properties of pure substances and solutions;
5. perform titrametric analysis;
6. determine the equilibrium constant of a chemical reaction;
7. perform qualitative analysis of selected cations on a small or micro scale;
and
8. determine the rate constants and activation energy of a chemical reaction.
Rationale
CHEM 124 serves as a laboratory course to accompany CHEM 123. It is a continuation of CHEM 122 and introduces additional aspects of laboratory chemistry.
Evaluation
Students are expected to complete all of the lab experiments. However, only ten labs (100 points) will count toward the performance portion of the final grade. Additional lab(s) will be dropped. Since it is very difficult to schedule make up labs for the number of students that we serve in chemistry here at CCBC Essex, a missed lab automatically qualifies as one that must be dropped. If all experiments are completed, only the ten highest scores will be used to calculate the performance grade. Students should note that there is a lab exam on the last day of lab. This lab exam may included content from all or any of the experiments performed. Hence it is very important that each student perform all the labs!
In addition to the performance grade, a portion of the final course grade will be determined by the results of a lab practical exam during the last week of the semester; questions may be asked about any of the lab experiments performed during the semester including any that individual students may have missed.
Performance Grade (10 labs or 100 pts)-75%
Lab practical and Qualitative Evaluation-25%
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Attendance and submission of a lab report will contribute 5.0 points for each lab. The quality of the lab report and results will contribute a maximum of an additional 5.0 points for each lab. For experiments that involved analysis of an unknown, submission of a lab report without indication of the appropriate unknown number will automatically receive a score of 5.0 points (credit for performing the laboratory and submitting a report). Students who complete a lab but do not submit a laboratory report will not be given credit for the laboratory experiment. A lab report should be completed by the beginning of the lab session one week after an experiment is performed. Lab reports received after others from the class have been graded and passed back will receive 5.0 points (credit for performing the lab and submitting a report).
It should be noted that the standard for grading of the lab results and reports will become more stringent as the semester progresses as students are expected to become more proficient with lab techniques as they are repeated in later experiments. This is especially true in titration analysis. We will adhere to a maximum of 3% error for acceptable work in experiments where the percent error can be determined. However, by the end of the semester a percent error less than one percent may be needed to be awarded an "A" score for the lab.
Each student is expected to attend lab regularly. All students are expected to be present in the classroom or laboratory when lab period is expected to start (1:25). See the comments in the previous section for policies regarding missed labs and tardiness. Late arrival for laboratory sessions is more serious than late arrival for lecture as the instructor provides information critical to performing the laboratory safely and successfully. The instructor reserves the right to penalize any student habitually arriving late for laboratory by reducing the qualitative evaluation portion of the final grade or to refuse to allow the student to perform the laboratory if it is judged that critical portions of the pre-lab lecture have been missed.
All cell phones, beepers or other electronic devices should be turned off during class or lab. Any student anticipating a possible need to make or receive an urgent call should notify the instructor of this possibility before the start of the class or lab.
Course Procedures
Course Materials
Bound Laboratory Notebook; Laboratory Safety Glasses (OSHA approved; goggle type may be purchased at the College Bookstore) .
All students are required
to have both a lab manual and a Laboratory Notebook. Data
from each experiment must be placed directly into the laboratory notebook
and laboratory reports must be prepared in the
laboratory notebook unless directed to do otherwise by the lab instructor.
TENTATIVE LAB SYLLABUS
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| September 1 |
Introduction
to lab; check-in; (Mandatory Attendance!) |
| September 8 |
Experiment 2 Part I: Determination of % Chloride in an Unknown (10) |
| September 15 |
Experiment 2 Part II: Determination of % Chloride in an Unknown (10) |
| Septmeber 22 |
Experiment 1:
Molecular Weight by Freezing Point Depression (10)
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| September 29 |
Experiment
3: Kinetics: The Iodine Clock(10) |
| October 6 |
Experiment 4: Spectrophotometric Determination of an Equilibrium Constant(10) |
| October 13 |
Experiment 5: Electrometric Methods, Part II (10) |
| October 20 |
Experiment 7: Solubility Product of Lead(II) Chloride (10)
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| October 27 | Experiment 8: Introduction to
Qualitative Inorganic Analysis (10) |
| November 3 | " " " (10) |
| November 10 |
Experiment 14; Redox Titration (10) |
| November 17 |
" " " (10)
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| November 24 | No Lab |
| December 1 | Lab Exam; Check-Out; Final due date for lab reports |
Important Dates
Last day to drop with 50% refund -----September 17
Last day of classes -----December 11
COLLEGE POLICIES FOR COURSE SYLLABI