CH 8: General Chemistry 1 Laboratory

Instructor: Jose Eduardo A. Barcelon

Department of Chemistry

CH 8: General Chemistry 1 LaboratorySchedule: 7:30-11:30am ThursdaysSEC C 206A

Instructor: Jose Eduardo A. BarcelonDepartment of ChemistrySchmitt Hall C-116jedbarcelon@yahoo.com426-6001 local 5633

Consultation hours:Tuesdays 9:00 AM to 12 NN or by appointment

Table of Experiments

WeekExp’t #

Lecture Chapte

rLaboratory Activity Report

1     Orientation and Check In  2 1 1 The Density of Beverages Formal3     Laboratory Report Writing Discussion4   2, 7 Chemical Nomenclature Activity5 2 6 Flame Test Short6   8,9 Bonding, Geometry, and Polarity of Molecules Activity7 3 3 Stoichiometry II: Which Copper Sulfide? Short8 4 4 Reactions of Copper Short9 5 5 Heat of Formation of NaCl(s) Formal10     Practical Laboratory Exam  11 6 10 Molar Mass of an Unknown Gas Short12 7 13 Molar Mass by Freezing Point Depression Formal13 8 15 Analytical Titration: Acetic Acid in Vinegar Formal14 9   Buffers Short15     Soap making Short16     Ice Cream Making  17     Reporting/Check-out  

BUT WAIT…Before we break bad, erhm, do science:

Please bring the following next meeting Lab gown or apron (to be kept in lab locker) Laboratory notebook (note: no lab notebook, no

experiment) Masking tape, paper towels

Laboratory Notebooks A laboratory notebook is required. No laboratory notebook,

no laboratory experiment. Leave the first page for Table of Contents; all pages should be

numbered. Do not tear pages off your notebook except for the ones to be submitted. Your lab notebook is provided with carbon paper for duplicates. You are to tear off only the original (white) page for submission of pre-lab reports and short post-lab reports.

All entries in the lab notebook should be written legibly in print using blue or black ink only. Missing lab pages will lead to deductions in lab performance. Write all observations and data directly on the lab notebook. Only blue or black pens can be used for writing. Laboratory experiment details should be written legibly in print. Do not use pencils nor scratch papers. For erasures, cross out the wrong figure once, i.e. 575 g. Do not use correction fluid or tape, nor totally blot out the wrong data.

Pre-lab A preliminary laboratory report (pre-lab) written on the

lab notebook must be prepared before the lab session. The pre-lab report (white copy, with the student’s signature on every page) must be submitted to the instructor two school days before the experiment). No pre-lab, no lab. This ensures that students are ready to perform the experiment upon entering the lab.

A short pre-lab discussion is given at the start of the laboratory session. The student should attend this discussion because changes in the procedure, safety reminders, and special lab techniques are given here. Failure to attend the entirety of the pre-lab discussion will forfeit the right of the student to perform the experiment.

Lab Reports The post-lab report may either be a formal or

a short report. Formal post labs must be typed and submitted

via email (email address to be provided). The submission should be in doc/docx format. The document should be in A4 size, with 1” margin on all sides, Arial font type, 12-pt font size, and single-spaced.

Tables and figures must be properly labeled and cited within the text; references must be duly acknowledged and cited also.

Lab Reports (cont.) Short post-lab reports are hand-written in the

notebook (maximum of two pages). Short post-lab reports include the filled data

section, computed results, a short discussion, and answers to questions. A reference section may also be included.

Short post-lab reports (white copy, with the student’s signature on every page) are due at the end of the lab session, while formal post-lab reports are due at start of the next laboratory period.

Lab Reports (cont.) Data for the formal post-lab reports should be

submitted at the end of the lab session. If the data for the experiment is not

submitted, formal post-lab reports will not be checked.

Late reports, will have a 5-point deduction per day.

For late (only late), non-electronic submissions, it is the student’s responsibility to have the reports received and time-stamped by a faculty or staff of the Chemistry Department.

Activities These refer to any activity that would be given

for Chemical Nomenclature and Bonding, Geometry, and Polarity of Molecules. These may be in the form of a group work or worksheet.

Lab Performance All lab sessions will be graded for laboratory performance except

for Chemical Nomenclature and Bonding, Geometry and Polarity of Molecules.

Deductions will be given for not following the safety guidelines, improper lab attire, improper lab techniques, and improper lab decorum. For example, the following misconducts would lead to demerits: Improper lab attire (i.e. not wearing apron or goggles) Improper handling of the reagents (includes the use of fume hoods) Contamination of the reagents Not logging-in the notebook beside the balance Using scratch papers, sleeves, and the like in data recording Working area was left unclean Gas valves left open Lockers left unkempt Water faucets left open Eating and drinking inside the lab

Quizzes A 5- or 10-point quiz will be at the start of every class/pre lab

discussion (except during days of reporting) to see if the student has a basic understanding of what the experiment will be about (e.g. procedure, precautions, etc).

Quizzes may also include comprehensive exams or practical tests.

If a student is late or absent and misses the quiz, s/he will get a zero for the quiz.

It is possible for the class to accumulate more than 10 quizzes for the semester. In the event that more than 10 quizzes are taken, only the highest ten quizzes will be counted for the final grade.

Strictly no cheating. Anyone caught cheating will get a grade of zero in that particular quiz. The maximum penalty allowed by the University will also be pursued.

Final Project The final project is an

ice cream making activity (Make Your Own Ice Cream).

Group assignments will be per table.

Other specific details of the activity will be discussed as a class at a later date.

Grading System

Quizzes 150Lab Performance (9 10) 90Pre-Lab Reports (9 10) 90Post-Lab Reports – Formal(4 40)

160

Post-Lab Report – Short (6 20)

120

Activities (2 20) 40Total 650

100> A ⩾ 92 > B+ ⩾ 87 > B ⩾ 80 > C+ ⩾ 75 > C ⩾ 68 > D ⩾ 60 > F

Attendance Attendance is required in all laboratory sessions. There

will be no make-up laboratory experiments. Excused absences are still considered cuts, but any activity missed (quizzes, etc.) will not be counted against the student’s grades.

Students are excused for only the following reasons: (1) Students who will represent the school in an official activity and present a letter endorsed by the Associate Dean for Academic Affairs; (2) Students who are ill and present a medical certificate attesting to the illness endorsed by the Associate Dean for Academic Affairs.

Only three (3) cuts, excused or unexcused, are allowed. Students who exceed this limit will be given a grade of W.

No lab sessions will be extended.

Laboratory Briefing/Orientation*

*Lab safety and all other shinanegans

Lab Attire Students must wear protective clothing during the laboratory

activities. This includes shirts with sleeves, jeans or long trousers, and closed shoes. Boiling liquids (water, acids, etc) can squirt a meter or more while dropped glassware fragments will explode out and hit your feet when dropped.

Those who are not properly dressed (i.e. wearing sleeveless shirts, shorts, skirt, shoes that show any skin on the feet) will not be allowed to perform the experiment, and will be marked absent.

Students must also wear apron and goggles at all times. If a student is caught not wearing apron or goggles, s/he will receive a deduction in the laboratory performance.

*also, for those with long hair, it is advised to tie it back

IMPROPER LAB ATTIRE

IMPROPER LAB ATTIRE

Proper attire

Laboratory Safety Safety guidelines will be provided during check-in, and students are

expected to know them by heart.

Concentrate on your work. Work independently (from opening your lockers, setting-up your experiment, to lighting your own Bunsen burner). In this context, talking with your lab classmate would be seen as a sign of being unprepared to perform the lab.

Approach your instructor for any questions or need for assistance.

Treat every chemical employed in the laboratory with caution. Avoid direct contact with reagents. You can have a terrible allergic reaction.

Immediately report any accident to the teacher.

No horse playing inside the laboratory.

Laboratory Safety Reagents. Avoid direct contact with reagents. Treat all

chemicals with respect. Each table has its own set of reagents. Do not use those from other tables. Always make sure that reagent shelves are clean. Dispose the waste chemicals as directed. Do not return excess chemicals in the reagent bottle. Never stick anything (i.e. your spatula, medicine dropper, or stirring rod) inside the reagent bottle.

Use of the balance. Always log-in before using the balance. Never weigh directly on the balance: Use a piece of paper or container to hold the sample to be weighed. Avoid spilling any of your reagents on the balance pan. Clean up any spills immediately.

Use of hood and burner. When the experiment produces noxious gases, perform the experiment under fume hood. Turn off the gas and fume hood after use.

Laboratory Safety To avoid accidents, keep the equipment and

working area clean. No bags, gadgets, valuables and other items not related to the experiment on the working area.

Do not forget your locker combination. If a student forgets the combination, s/he can ask the stockroom technician for it, but will merit a deduction in the laboratory performance.

After leaving the laboratory, each student is highly encouraged to pass by the comfort room to wash their hands before resuming to other activities.

Lab Decorum Cellular phones, laptops, PDAs, and iPods must not be used

and must be turned off during class.

Only calculators can be used to make computations.

Eating and drinking are not allowed inside the laboratory. It is dangerous because of poisonous chemicals in the lab and on countertops which can make you very sick or even kill you.

NOTE: Students with health concerns like asthma, pregnancy, allergies, etc. should inform the instructor of such at the start of the semester. Students not feeling well during a class should inform the instructor of the sickness before the start of the laboratory session.