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CHEM 121 Laboratory: Winter 2013

Welcome to the lab portion of CHEM 121 !

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CH3

CH3

CH3

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3. Introduction 5. Lab Safety 9. Purpose of Labs

12. Part A of Experiments 13. The Lab Manual 17. Experimental Design Form 18. On-Line Introductory Material 28. Lab Quiz 31. HELP Centres

33. Part B of Experiments 35. Lab Reports 37. Laboratory Mark 38. Make-ups

40. Groups A and B 41. General Lab Schedule Sheets 44. Lab Website Calendar 46. A Brief Tour of the Lab Manual 47. Lab Check-In Week Instructions

Outline

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Introduction

Laboratory Director:

Dr. Sophia Nussbaum

Office in lab room B372

E-mail: 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.

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The Lab Manual

Please purchase a copy of the CHEM 121/123 Lab Manual 2013-14 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Please note: outdated lab manuals should not be used. You MUST bring your lab manual to the check-in lab.

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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 Lab Safety Video available on the laboratory Connect web site.

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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 17 (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.

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Safety in the Lab

Lab Coats

Students are required to wear lab coats. Students who do not wear a lab coat will be discharged for the period and will be given a total mark of zero for the missed laboratory.

The Chemistry Graduate Student Society sells the lab coats and safety glasses at reduced prices. The signs are posted in the hallways.

Safety glasses and lab coats can also be purchased in the Bookstore. The lab coats MUST be long and 100% cotton.

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Safety in the Lab

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 and socks.

(2) Wear long pants. Your legs must be protected.

(3) Tie long-hair back out of face. So that it doesn't fall into the beaker full of acid, or a flame etc.

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Purpose of the CHEM 121 Lab

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

"Ni" Ni OCHMe21

Me2CHO-Na+ R2CO Ni

OOCHMe2

R2C2

NiOO

R2C

HCMe2

3

Ni O CMe2

(a) (b)

(c)

(d)

Me2CO

H+

R2CH(OH)

NiOO CMe2

4R2CH

(e) (fast)

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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:

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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…..

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Part A of an Experiment

1. Read the Lab Manual

2. Read the On-Line Introductory Material

3. Complete the Experimental Design Form

4. Attempt the Sample Quiz

For example, refer to page 59 of your lab manual for a list of the Dry Lab Week

requirements for Experiment #3A.

At home, prepare for the lab:

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Part A of an Experiment:(1) Read the Lab Manual

A sample page from the lab manualRecall 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.

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Part A of an Experiment:(1) Read 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

Question

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Part A of an Experiment:(1) Read the Lab Manual

Answers to the questions are found within the main text.

A sample page from the lab manual

Answer

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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.

For example, page 28 of the lab manual has this concept map for Experiment #1B.

precise

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Part A Requirements: (2) Experimental Design Form

• 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 39-40 are the design form for Exp #1B.

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

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.

Need help? Check out the Experimental Design Guide on p. 4 in your lab manual.

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Part A Requirements: (3) On-Line Introductory Material

This on-line material is meant to help you design your experiment. There are two types of multimedia resources available to you.

1. Technique Modules 2. 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 59, 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 Lab Feedback Form to 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).

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(3) Introductory Material:Technique Modules

The Technique modules are located on-line on the Chemistry Laboratory Connect site. Access them by clicking on the appropriate experiment.

First click on the Menu item

on the left panel

Click to access the modules

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(3) Introductory Material:Technique Modules

questions

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.

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(3) Introductory Material:Technique Modules

You can use any of the public-access high-speed terminals on campus if you don’t have access at home (SUB, libraries, etc.).

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.

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(3) Introductory Material:The Virtual Lab

The Virtual Lab (VL) program consists of VL Activities and Interactive Tutorials. The Activities allow 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 Interactive Tutorials help with calculations

required for various experiments.

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The Virtual Lab software

The VL program can be accessed by clicking on the Virtual Lab link within each experiment listed in Connect. The Virtual Lab contains assignments which must be completed during the appropriate dry weeks and handed in to TAs for marks.

The VL contents can also be accessed through the Virtual Lab Quick-link on the Connect menu panel.

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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.

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Part A Requirements:(4) The Sample Quiz

Each in-lab session will begin with a 10 - 15 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 36 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.

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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-Line Introductory 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 36 of the manual.

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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.

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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 Chemistry Resource Centre (room B357). 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.

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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 TAs. 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. However, there will be a time slot each week when a Resource Centre TA will answer some of your questions. These times will be posted.

Access to the Discussion Board is through each experiment on the laboratory Connect page. General questions can be posted to the Class Discussion board accessed through the left menu panel.

Need Help? Discussion Board

Click here

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Part B of an Experiment

In the lab:

1. Perform the experiment. Collect Observations and Data onto your

Experimental Design Form.

2. Clean up your bench area. Ask your TA to sign it off.

3. Mark the Observations taken by a fellow student (Peer Marking).

4. Have your TA sign your Experimental Design form.

5. Have your TA check your Result and sign your Report sheet.

After the lab at home:

Finish your Lab Report.

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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 (10 -15 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).8. When there are only 20 minutes left, you must begin to clean-up your bench area. 9. Complete Peer Marking (instructions will be given in the lab) and have your TA sign

your marked Observations on the Experimental Design Form. 10.Have your TA check your result and sign the Report Sheet before you leave the lab.

Data and observations must be recorded in pen. A lab report that has not been signed by your TA might not be graded. Marks will be deducted for an incomplete clean-up.

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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 41-42 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.

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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.

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Laboratory Mark

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.

Lab average for 2012 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.

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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). Students MUST see the lab director if they miss an experiment.

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. 15 – 16 in your lab manual.

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Groups A and B

Lab students will be split into two groups, A and B, alphabetically by their last name.

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 9th we will post lists in the Laboratory Connect informing the Tuesday students whether they are in Group A or Group B. We will continue posting the lists for other sections one day before their scheduled lab time. The two groups, A and B, will check into the lab at different times during the Check-In Week (Sept 10 - 13).

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How Do you Know What to Do?

You will receive a Lab ID

during the Check-In Week.

The Lab ID label will be

placed on an appropriate

Lab Schedule in your lab

manual. This schedule

clearly describes when

and what you must do.

Only the column

designated by the Lab ID

label should be used.

A Lab ID label will be placed on top of one of the columns during the

Check-in.

Jane Student12345678

Lab ID B5249

Jane Student will do the experiments in the

following order: Exp. #1, #4, #2, #3 and #6 on the

days indicated in the middle column.

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Lab Schedule Example: Group A2

Experiment title (colour coded)

Check the room number.

Exp. Number

Group ID:Letter A & second

digit of Lab ID

Date

Exp. 1Exp. 2 in Lab B272

Check Room # Quantitative Determination of Lead in a Contaminated Drinking Water SupplySynthesis: Preparation of Alum from Waste Aluminum Pop Cans

49Your NameStudent #

Lab ID A3249

Your Lab ID # label. It indicates you should use the Schedule for Group A2.

Your Bench Number. These are the last two digits of your Lab ID. This is where

you will be working in the room.

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Lab ID

It is important to understand how your Lab ID works to avoid mistakes in reading

the schedule:

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.

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Brief Tour of the Lab Manual

Structure of the Manual:

Inside Front Cover Marks distribution

Information page Important information about the lab

Schedules Chem 121 Colour Laboratory Schedules

Table of Contents

Pages 1 - 24Pages 25 – 114

IntroductionChem 121 Experiments

Schedules Chem 123 Colour Laboratory Schedules

Pages 117 - 196 Chem 123 Experiments

Pages 197 - 224 Techniques

Graph paperInside back cover Periodic Table

Please read p. 1-24 for a review of the material in this slide show and also for supplemental information not covered in this slide show.

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Lab Check-In Week Instructions

Check the monitors in front of the labs.

Go to the labroom assigned to

you (272, 370 or 372).

Pick up one ofthese cards as

you enter the labroom.

2013 WINTER SESSION

Lab Check-In Week Instructions

Open your Lab Manual on Group A or Group B schedule, according to your Group assignment.

Give the Registration card to the TA and the TA will place your Lab ID label on the correct schedule. Confirm that the name and the student # on the label are correct!

Please fill in yourinformation

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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 1-24 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 !