CHEM 121 Laboratory: Winter 2009 Welcome to the lab portion of CHEM 121 ! This slide show is best viewed at a resolution of 1024 x 768. Outline 3. Introduction 5. Lab Safety 8. Purpose of Labs 32. Part B of Experiments 34. Lab Reports 36. Laboratory Mark
Welcome to the lab portion of CHEM 121 !
This slide show is best viewed at a resolution of 1024 x 768.
5. Lab Safety
8. Purpose of Labs
32.Part B of Experiments
34. Lab Reports
36. Laboratory Mark
11.Part A of Experiments
12. The Lab Manual
16. Experimental Design Form
17. On-Line Introductory Material
30. HELP Centres
39.Groups A and B
40. Personal Lab Schedule Sheets
43. Lab Website Calendar
45. A Brief Tour of the Lab Manual
46. Lab Check-In Week Instructions
Dr. Sophia Nussbaum
Feel free to e-mail me questions. However, as there are over 2000 students in CHEM 121, please first ask TAs (teaching assistants) in the Resource Centre for help, or use the on-line Discussion Board, before sending me e-mail. Otherwise, I will be swamped with masses of e-mail, and will likely stop answering any questions by e-mail. Thanks for your understanding. Note that I do NOT check e-mail on weekends. The Resource Centre and Discussion Board are described later on.
Please purchase a copy of the CHEM 121/123 Lab Manual from the UBC Bookstore before proceeding any further with this Introductory Slide Show as we will be referring to numerous pages in the manual.
The manual cover is shown here.
Please note: outdated lab manuals should not be used.
Your physical safety is the number one concern in the lab.
Some of the chemicals that you will use can seriously harm you if you do not observe the laboratory rules. Please respect the safety protocols!
Before coming to the lab, please watch the Personal Protective Equipment movie available on the laboratory web site at www.chem.ubc.ca/courseware/121/
You must have eye-protection on at ALL times! Your TA will ask you to leave the lab if after repeated warnings you are not wearing any eye-protection.
You can rent safety-glasses in the lab for $1 per lab session.
Prescription glasses are suitable eye-protection as long as they meet the size requirements listed on page 16 (point i) of the lab manual. If your glasses are too small, you will have to wear safety glasses on top of your prescription glasses.
Contact lenses are not recommended as chemical fumes can melt contacts onto your eyeball! Either wear your prescription glasses, or rent special safety-goggles in the lab.
Students are not required to wear lab coats. We thus recommend that you wear clothes to the lab which you don’t mind getting ruined in the event of a chemical spill. Only the TAs and Lab Technicians wear lab coats.
The following three points must be strictly adhered to:
(1) No open-toed shoes. So that you won't damage your foot if you drop chemicals on it. Please wear closed shoes.
(2) No cropped T-shirts.Your waist is at the same level as the bench-top and you could get a chemical burn on your stomach.
(3) Tie long-hair back out of face.So that it doesn't fall into the beaker full of acid, or a flame etc.
In this course we want you to see what it is like to be a researcher in chemistry.
1. identifying a problem
2. finding information in the literature
3. posing scientific questions
4. formulating a hypothesis
5. designing an experiment to test the hypothesis
6. learning new experimental techniques
7. analyzing data & drawing conclusions
8. recognizing safety issues
There are many steps to performing chemical research. You will be learning how to do the various things listed below in the CHEM 121 lab course:
Each experiment has two parts and lasts two weeks:
part A = “Dry Lab Week”
This involves doing preparatory work done at home before Part B. You will have an entire week for Part A.
part B = “Wet Lab Week”
This is the actual experiment performed in the lab.
Your are expected to spend an equal amount of time on both parts of an experiment!
Let’s take a look at Part A requirements first…..
At home, prepare for the lab:
1. Read the Lab Manual
2. Read the On-LineIntroductory Material
3. Complete the Experimental Design Form
4. Attempt the Sample Quiz
For example, refer to page 57 of your lab manual for a list of the Dry Lab Week requirements for Experiment #3A.
Recall that we want you to learn to think the way a chemistry researcher does.
The lab manual has thus been written in a manner that is designed to focus and direct this thinking process.
A sample page from the lab manual
A sample page from the lab manual
Specific questions are asked in the side column of the text. These are meant to focus your thoughts.
A sample page from the lab manual
Answers to the questions are found within the main text.
A Concept Map summarizes the most important concepts of the experiment and their relationships.
It is a good idea to start reading an experiment with the concept map.
For example, page 26 of the lab manual has this concept map for Experiment #1B.
The lab manual does not provide “easy-to-follow” step-by-step procedures for each experiment.
For example, pages 37-38 are the design form for Exp #1B.
Need help? Check out the Experimental Design Guide on p. 4 in your lab manual.
Your TA will briefly check your Design Form at the beginning of the in-lab session (Wet Lab Week) to ensure that you haven't made a critical mistake.
This on-line material is meant to help you design your experiment. There are various types of multimedia resources available to you.
1.Technique Modules2.Glossary3.The Virtual Lab
The Dry Lab Week Requirements page for Part A of each experiment lists the specific On-Line Introductory Material that is available for that experiment.
For example, see page 57, point #2. For Experiment #3A, there are two Technique Modules and a Virtual Lab Interactive Tutorial to be done on-line. Be sure to bring the Virtual LabFeedback Formto the Wet Lab.
You are strongly recommended to read all On-Line Introductory Materials, as some of the Lab Quiz questions will be based on this material (discussed later).
The modules are located on-line on the ChemistryLaboratory Web Area page.
Click on the Laboratory Web Area
On-line introductory materials are accessed through the laboratory Vista page. You will need to use your CWL to sign into Vista. Once in Vista choose Chemistry 121 laboratory from your course list and then click on the icon for the Laboratory Web Area.
The lab Web Area page will load. Notice the various tabs at the top of the page.
Click on Techniques
You will then be taken to the webpage shown to the left.
Click on the appropriate links for the modules associated with a particular experiment.
The Technique modules have pictures of the actual equipment that you will use in the labs.
There are also questions located throughout the modules that you should consider answering, as they might be on the in-lab Quizzes.
Most Technique modules also have slide shows that depict exactly how to use various apparatus, or how to correctly use certain glassware.
These slide shows should greatly assist you in preparing your Experimental Design Form.
You can use any of the public-access high-speed terminals on campus if you don’t have access at home (SUB, libraries, etc.).
Click on Glossary
The following webpage has all of the terms from the CHEM 121 & 123 labs listed.
You can search alphabetically, or see which terms are used in each experiment.
Most definitions have a picture of the actual equipment, and there are also hyperlinks to all similar or associated terms.
This is a purely optional resource.
The Virtual Lab programme allows you to simulate titration experiments.
You can fully design your experiment using the Virtual Lab to test various scenarios.
During the Lab Check-In Session there will be a full demonstration on how to use the Virtual Lab.
To find the Virtual Lab software, go to the Vista page and click the Virtual Lab Web Area button. Or, from the Techniques page, click on the Virtual Lab link.
(1) Click on
(2) Then choose an activity
The accompanying Virtual Lab Feedback Form can be printed when the activity has been completed:
The VL Feedback Forms
are worth 2 -3 marks.
Each in-lab session will begin with a 5 - 10 minute quiz. Any material covered in that particular experiment’s On-Line Introductory Material may potentially be asked about in the quiz. Any material found within the lab manual may also potentially be on the quiz.
The lab manual has a Sample Quiz for each experiment. These types of questions will definitely be on the quizzes. For example, see page 34 of the lab manual for the Sample Quiz of Experiment #1B.
The purpose of the quiz is merely to test your level of preparation for the experiment. It is not meant to be difficult. However, if you have not read the lab manual or the On-Line Introductory Material, you will likely fail the quizzes.
We have now covered all of the Part A requirements that must be done at home before coming to the lab to do Part B during the “Wet Lab Week”.
1. Read the Lab Manual
2. Complete the Experimental Design Form
3. Read the On-LineIntroductory Material. Print out the Virtual Lab Feedback Form
4. Attempt the Sample Quiz
Each experiment has a Check-List in the lab manual to remind you of all the Dry Lab Week components. For example, see the middle of page 34 of the manual.
If your Experimental Design Form is not filled out at the beginning of the in-lab session, then your TA will know that you are not prepared for the experiment.
You may potentially be considered a Safety Hazard to all of the other students.
Your TA will ask you to leave and book a Make-Up lab with the Lab Director. You will automatically lose 5 marks for that lab.
If you need the help of a TA outside of the lab session, for whatever reason, then please go to the ChemistryResource Centre (room D125). The TAs that staff this room are not the same people that work in the labs. However, they all have access to the CHEM 121 Lab TA Manuals, and also have access to the Problem Set Answer Keys for the Lecture material. They should thus be able to help you with all aspects of both the lecture and lab.
The Resource Centre is usually open Mon-Fri, and the hours of operation will be posted on the door.
Please do NOT try to contact your regular TA outside of the lab. They are not paid to do any “out-of-lab” student contact, and are operating strictly under the TA Union’s Guidelines. If you need to hand in a late Lab Report, or give your TA a message, please do so through the Lab Director in room B372.
Another resource available to you for help is the Discussion Board. This is an on-line bulletin board where you can post questions to fellow CHEM 121 classmates, and hope that you receive an answer.
The Discussion Board is not moderated by the Lab Director or any of the Lab Staff. This means that if erroneous information is posted, no one will be there to remove it, so be careful about the quality of advice that you receive.
Access to the Discussion Board is through the laboratory Vista page. Once you have logged in and selected the appropriate Vista coursepage, click on the “Discussions” button.
In the lab:
1. Perform the experiment. Collect Observations and Data onto your Experimental Design Form. Use the carbonless copy paper as directed.
2. Clean up your bench area.
3. Have your TA check your Result and sign your report sheet.
4. Hand in the carbonless copy of your Experimental Design to your TA.
Laboratory Reports are written on Laboratory Report Sheets (coloured pages) provided in the lab manual with each experiment. Some parts of the report must be completed in class, the rest is done at home after the lab session.
For example, refer to pages 39-40 of the lab manual.
Reports are due at the beginning of the next in-lab session(normally 2 weeks later).
Reports are marked by TAs and returned during the next Wet Lab session for your inspection only. You may then keep the Cover Page but must return the rest of the Lab Report.
Students are encouraged to work together when designing the experiments.
However, each person must write their own Experimental Design Form.
Students must write their own Lab Reports.
Students copying any portion of each other's lab reports will receive a "0" on the entire report. Pay special attention when writing your Discussion to ensure that it is unique.
Lab average for 2008 session was 17 / 20.
The only people who ever fail the lab are those who miss entire experiments and don’t schedule Make-Up sessions.
All together, the lab is worth 20% of your course mark.
You must pass both the lab& lecture components of the course to pass Chem 121.
1. You will receive a personal Lab Schedule Sheet during the Check-In Week. This sheet clearly describes when and what you must do.
2. Go to the Chem 121 Lab Web Area where you will find an interactive calendar with links for each assignment.
You must login with the correct Group Number to ensure that the calendar matches your own Lab Schedule Sheet.
Lab students will be split into two groups, A and B.
Group A students will all be “in-lab” performing a Wet Lab Week experiment, while Group B students will all be at home doing a Dry Lab Week assignment.
On Monday Sept 14th we will post lists in the Laboratory Web Area informing you whether you are in Group A or Group B. The two groups will check into the lab at different times during the Check-In Week (Sept 15 - 18).
Your Lab ID #. Please write
this onto everything that you hand in.
Your Bench Number.
This is where
you will be working
in the room.
Come to the Lab when
you see a room number.
On the lab Web Area page you will see a calendar. It should be automatically highlighting the current week. As long as you are logged in with the correct Group ID, the interactive calendar will correctly show you what your tasks are for each week. This calendar should match the Personal Lab Schedule Sheets.
Click here to change Groups
It is important to understand how your Lab ID works to avoid mistakes in reading the calendar:
Due to rotation, different students perform experiments in different order. The order of experiments is determined by the second digit in the Lab ID – the Group ID.
Structure of the Manual:
Inside the Front Cover:
Important Information about E
Next Two Pages:
Table of Contents, with Contact Information
Experiments (with Dry and Wet Weeks’ requirements)
Techniques (same as the info found on
Carbonless copy paper and graph paper
Inside the Back Cover:
Please read p. 1-22, and especially p. 1-17 for a review of the material in this slide show and also for supplemental information not covered in this slide show.
Pick up one of
these cards as
you enter the lab
to go to the lab
room assigned to
you (370 or 372)
and also the door
assigned to you
(A, B, C, or D).
Please fill in your
Then go to your assigned Table (1-4). Give this card to the TA and you will receive your own lab schedule sheet.
Thank you for viewing this Lab Introduction Slide Show.
Any remaining questions you might have will likely be answered either:
(1) On pages 1-17 of the lab manual.
(2) During the Lab Check-In Week.
If neither of these answer your question,
then please feel free to come and talk to
me, Dr. Sophia Nussbaum, in my office.
Good luck to everyone in CHEM 121 !