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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

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chem 121 laboratory winter 2009
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.

slide2

Outline

3.Introduction

5. Lab Safety

8. Purpose of Labs

32.Part B of Experiments

34. Lab Reports

36. Laboratory Mark

37. Make-ups

11.Part A of Experiments

12. The Lab Manual

16. Experimental Design Form

17. On-Line Introductory Material

27.Lab Quiz

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

introduction
Introduction

Laboratory Director:

Dr. Sophia Nussbaum

  • office in lab room B372
  • 604 - 822 - 2362 (office)
  • freshmanchemlabs@chem.ubc.ca

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.

the lab manual
The Lab Manual

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Please note: outdated lab manuals should not be used.

safety in the lab
Safety in the Lab

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/

safety in the lab6
Safety in the Lab

Safety Glasses

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.

safety in the lab7
Safety in the Lab

Lab Coats

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.

purpose of the chem 121 lab
Purpose of the CHEM 121 Lab

In this course we want you to see what it is like to be a researcher in chemistry.

what is involved in chemical research
What is involved in chemical research?

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:

chem 121 experiments
Chem 121 Experiments

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…..

part a of an experiment
Part A of an Experiment

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.

part a of an experiment 1 read the lab manual
Part A of an Experiment:(1) Read the Lab Manual

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

part a of an experiment 1 read the lab manual13
Part A of an Experiment:(1) Read the Lab Manual

A sample page from the lab manual

Question

Specific questions are asked in the side column of the text. These are meant to focus your thoughts.

part a of an experiment 1 read the lab manual14
Part A of an Experiment:(1) Read the Lab Manual

A sample page from the lab manual

Answer

Answers to the questions are found within the main text.

part a of an experiment 1 read the lab manual concept maps
Part A of an Experiment: (1) Read the Lab Manual: Concept Maps

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.

precise

For example, page 26 of the lab manual has this concept map for Experiment #1B.

part a requirements 2 experimental design form
Part A Requirements: (2) Experimental Design Form

The lab manual does not provide “easy-to-follow” step-by-step procedures for each experiment.

  • You are given the necessary background information on concepts and techniques.
  • You must then piece this information together to devise a procedure that you can
  • follow in the lab.
  • Keep it simple….use point-form style.
  • Fill out the Experimental Design Form with steps that you plan on following in the lab.

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.

part a requirements 3 on line introductory material
Part A Requirements: (3) On-Line Introductory Material

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).

3 introductory material technique modules
(3) Introductory Material:Technique Modules

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.

chem 121 laboratory web area
Chem 121 Laboratory Web Area

The lab Web Area page will load. Notice the various tabs at the top of the page.

3 introductory material technique modules20
(3) Introductory Material:Technique Modules

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.

3 introductory material technique modules21
(3) Introductory Material:Technique Modules

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.

questions

3 introductory material technique modules22
(3) Introductory Material:Technique Modules

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.).

3 introductory material glossary
(3) Introductory Material:Glossary

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.

3 introductory material the virtual lab
(3) Introductory Material:The Virtual Lab

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.

the virtual lab software
The Virtual Lab software

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

Virtual Lab

(2) Then choose an activity

virtual lab feedback forms
Virtual Lab Feedback Forms

The accompanying Virtual Lab Feedback Form can be printed when the activity has been completed:

The VL Feedback Forms

are worth 2 -3 marks.

part a requirements 4 the sample quiz
Part A Requirements:(4) The Sample Quiz

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.

part a of an experiment dry lab week
Part A of an Experiment:“Dry Lab Week”

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.

a word of caution
A word of Caution…..

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.

need help resource centre
Need Help? Resource Centre

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.

need help discussion board
Need Help? Discussion Board

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.

Click here

part b of an experiment
Part B of an Experiment

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.

  • After the lab at home:
      • Finish your Lab Report.
what happens in the lab
What happens in the Lab?
  • During the 3-hour lab period:
  • 1.Enter lab rooms (B272 / 370 / 372) and go to your assigned bench (# 1 - 48).
  • 2. Store your bag / jacket in cupboards under the sinks.
  • 3. Write the quiz (5-10 min).
  • 4. Listen to the Lecturing TA’s brief Intro / Demo lecture (~ 5 min).
  • 5. Break into groups with your own TA and discuss the experiment (~ 5 min).
  • 6. Have your TA briefly check your Experimental Design Form.
  • 7. Begin performing the experiment (no lab partners, except for Exp #3).
  • When there are only 15 minutes left, you must begin to clean-up your bench area.
  • Have your TA check your result and sign the Report Sheet before you leave the lab.
  • Hand in the carbonless copy of your Experimental Design to your TA.
  • Data and observations must be recorded in pen. A lab report that has not been signed by your TA might not be graded.
laboratory reports
Laboratory Reports

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.

reports design forms
Reports & Design Forms

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.

laboratory mark
Laboratory Mark

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.

making up a missed lab
Making up a Missed Lab
  • Students are required to complete all of the scheduled experiments in order to pass the course.
    • If a student misses an experiment, he/she is responsible for arranging a make-up session with the Laboratory Director (Room B372).
    • A make-up session is only permitted under special circumstances; writing a midterm on a lab day is not considered a special circumstance.
    • For details see p. 14 – 15 in your lab manual.
how do you know what to do
How Do you Know What to Do?

1. You will receive a personal Lab Schedule Sheet during the Check-In Week. This sheet clearly describes when and what you must do.

or

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.

groups a and b
Groups A and B

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).

personal lab schedule sheets group a41
Personal Lab Schedule Sheets: Group A

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.

Group

ID

SAMPLE

Specific assignments

Exp

Number

Date

Come to the Lab when

you see a room number.

chem 121 laboratory website calendar
Chem 121 Laboratory Website Calendar

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

Group ID

assignments

lab id
Lab ID

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.

brief tour of the lab manual
Brief Tour of the Lab Manual

Structure of the Manual:

Inside the Front Cover:

Marks Distribution

Next Page:

Important Information about E

-

Mail

Next Two Pages:

Table of Contents, with Contact Information

Pages 1

-

2

2

:

Introduction

Pages 2

3

-

2

06

:

Experiments (with Dry and Wet Weeks’ requirements)

Pages 2

07

-

2

33

:

Techniques (same as the info found on

-

line)

Followed by:

Carbonless copy paper and graph paper

Inside the Back Cover:

Periodic Table

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.

lab check in week instructions
Lab Check-In Week Instructions

Pick up one of

these cards as

you enter the lab

room.

Please remember

to go to the lab

room assigned to

you (370 or 372)

and also the door

assigned to you

(A, B, C, or D).

lab check in week instructions47
Lab Check-In Week Instructions

Please fill in your

information

Then go to your assigned Table (1-4). Give this card to the TA and you will receive your own lab schedule sheet.

the end
The End

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 !