Chem 152 GENERAL CHEMISTRY LABORATORY II (2 Cr. Hrs ...

Chem 152 GENERAL CHEMISTRY LABORATORY II (2 Cr. Hrs) Syllabus of Spring 2011 INSTRUCTOR: Dr. Kit Mao (office hours: T F 12:00 – 1 pm in LS101F, email: [email protected]) LECTURE: Monday 12:00 pm (Section 01) and 2:00 pm (Section 02) in LabSci 300 LABORATORY (3rd floor of LabSci Building): Lab Section Meeting time

TEXT:

A Tu 8:00 am 12:00 pm B Tu 1:00 pm 5:00 pm C W 1:00 pm – 5:00 pm D Th 8:00 am – 12:00 pm E Th 1:00 pm – 5:00 pm F F 1:00 pm – 5:00 pm G Sa 9:00 am 1:00 pm "Chemistry 152 Laboratory Manual (Spring 2011)", Washington University published..

COURSE DESCRIPTION: This course is a continuation of Chem 151 but has an emphasis on quantitative measurements in the chemical sciences. It is designed to be taken in parallel with the second semester of the general chemistry lecture series (Chem 112A) and provides laboratory experience in, for example, acid/base chemistry, redox chemistry, solubility, electrochemistry, thermochemistry, and kinetics. These topics and the associated experiments in the lab complement materialS covered in Chem 112A. Students are expected to attend a lab lecture every week and to perform the experiments as scheduled. The experiments include: Exp.1--- ERROR ANALYSIS: Illustrated by an Experiment to Determine the Gas Constant Exp.2--- INTRODUCTION TO QUANTITATIVE ANALYSIS: Determining the Density of a Solution and Diffusion rate of Hydrochloric Acid

Exp.3---ACID-BASE EQUILIBRIA (I): Determining the Purity of an Unknown Acid by Acid-Base Titration Exp.4---ACID-BASE EQUILIBRIA (II): Buffer Solution and Acid-Base Titration Curves Exp.5---SOLUBILITY EQUILIBRIA: Determining Solubility Products Exp.6---THERMOCHEMISTRY: Enthalpy of Reaction and Enthalpy of Formation Exp.7---CHROMATOGRAPHIC SEPARATIONS and Determining Concentrations by Spectrophotometry Exp.8---ELECTROCHEMISTRY( I): A Ferricyanide/Ferrocyanide Concentration Cell Exp.9---ELECTROCHEMISTRY (II): A Redox Titration Curve Exp.10---CHEMICAL KINETICS : Determining the Rates of Chemical Reactions Students are also expected to read the tutorial assignments posted on the course website, which is linked through the chemistry department website, www.chemistry.wustl.edu. The list of tutorials is: T1--- Gas Law Save Lives: the Chemistry Behind Airbags T2--- Maintaining the Body’s Chemistry: Dialysis in the Kidneys T3--- Acid Rain T4--- Blood, Sweat, and Buffers: pH Regulation During Exercise T5--- Phase Changes and Refrigeration: Thermochemistry of Heat Engine T6--- Nutrients and Solubility T7--- Improving Air Quality with Electrical Vechicles

EXAMS:

Both a mid-term exam and a cumulative final exam will be given and are mandatory.

HOMEWORK: Students are required to submit pre-lab assignments and lab reports ON TIME. Points will be deducted for tardiness; 10 pts. for a late Pre-lab assignment/report and 5 pts. for a set of late lab notebook pages.

LAB BEHAVIOR Proper lab safety procedures must be followed at all times. Student could be dropped from the course for violation of lab safety rules. At the end of the semester, the TA will award 0 to 20 bonus points to each student according to his/her lab behavior, such as punctuality, sense of responsibility, organization skill, cleanliness, preparedness, and understanding of the experiment.

GRADING: Follows the guidelines in Chem 151 Course Architecture listed in the Chem 151 Lab Manual

Summary of Responsibilities of Chem 152 Students (Refer to the Chem 152 Lab Manual for further details) 1. Check and make use of the information on the course homepage (www.chemistry.wustl.edu). The Pre-lab Practice and video demonstration on the web are usually very helpful in your lab work and doing lab reports.

2. Attend all lab lectures. Prior to coming to lecture, read the experiment and print out the lecture slides. 3. Before coming to lab, complete the Pre-lab Assignment in your lab manual. Be on Time! The Pre-lab Assignment page should be submitted to your TA before the TA pre-lab presentation; a late Pre-lab Assignment will be deducted 10 pts. You will not be admitted to the lab if you are late for more than an hour. You are not allowed to stay in the labs past your lab periods whether or not you finish the experiments.

4. Perform the experiments independently and in your fume hood only. Record results in your lab notebook. Before leaving lab, submit a copy of your notebook pages to your TA and keep a copy for yourself.

5. Follow the proper lab safety procedures and wear proper attire in all laboratories, as is described in the lab manual. If you wear improper attire, you must return home to change before you may begin the experiment. 6. Write reports and notebook pages in permanent ink; use a single line to strike out errors in writing; do not use pencils, red pens, or whiteout. 7. Turn in the lab reports to the red slotted locker (located in the 3rd floor hallway outside LS330) at times as specified on each lab report (either before the end of the lab period or before 5 pm of the next day for reports with graph-plotting). The grade for a late lab report will be reduced by 10 points. 8. Late reports will NOT be accepted after 5 pm on the Monday following the week in which it is due, because the “Grader’s Remarks” (which includes answers to the common mistakes made in the lab reports) are typically posted on the next day (Tuesdays). 9. Plan to perform all 10 experiments during this semester; your 8 highest scores will count towards the course grade. Make-up labs are NOT POSSIBLE. In case of an absence, the missed experiment(s) will be the dropped score. If you miss more than two labs/reports, it is likely that you will fail the course, regardless of the total points. 10. Both mid-term exam and final exams are mandatory; absence will be recorded as a “zero.” 11. In case of a possible grading error, you may ask for a re-grade. All re-grade requests must be accompanied by the original document and a complete re-grade requested form found in the Appendix of the lab manual, stapled to the first page of the exam/report/assignment, clearly indicating the reason for the request, and turn in to the re-grade locker before the deadline day and time. 12. Plan to check out your lab drawers at the end of the semester. Failure to check out will result in an incomplete grade for the course. If you claimed a locker in the hallway, you should empty it and leave it unlocked at the end of the semester. Everything left inside the lockers will be trashed after May 15, 2011.

The Washington University policy on Student Academic Integrity applies at all times in this course. Violation of academic integrity could lead to an “F” course grade regardless of academic performance.

In case HELP is needed, 1. Make use of the course website. All lectures will be recorded and are available to students. Go to the course website to access the Streaming video of Lectures, Lecture PowerPoint slides, Lab technique demonstrations, Exam Info, Course calendar, plus all the useful information mentioned below. The URL of the course web is: http://www.chemistry.wustl.edu/~courses/genchem/152_sp11.htm It can also be accessed by going to www.chemistry.wustl.edu, click on COURSE PAGE , choose Chem 152, then, click on Chem152 Course Website. 2. For every experiment, there are Pre-lab Practices to help you with the concepts and calculations associate with the experiment. The Pre-lab Practices are posted with answers on the Lab Info page of the course website. 3. If you needed more practice, there are Drilling Question Sets posted on the Lecture page of the course web. Answers of the drilling questions are posted on a separate link and will be discussed in the Help Sessions. Listed below are the topics of the Drilling Question Sets: Set A

Error Analysis and Significant Figures

Set B

Concentration of Solutions and the p-Scale

Set C

pH of Acid/Base/Salt Solutions

Set D

Buffer Solutions and Reactions of Acids and Bases

Set E

Solubility and Solubility Product

Set F

Galvanic Cells

Set G

Redox Titration

4. A help session is offered every Monday at 5 pm in LS250 (except the first help session is in LS300). This is to answer questions pertaining to the experiment performed in the previous week and the one to be performed in the coming week. 5. Dr. Mao holds office hours every Tuesday to Friday at 12 pm – 1 pm in LS 101F. 6. TAs hold office hours Monday → Saturday in LS 460. The office hour schedule is posted on the course website. 7. Listed below are a few General Chemistry text books (for using in the library only) available in the reserved book section of the Chemistry Library (Louderman 549). o

“Chemistry” by J. McMurry and R. Fay, Prentice Hall published

o

“Chemistry & Chemical Reactivity” by J. Kotz and P. Treichel, Saunder College publishing (w/ Student Solution Manual)

o

“General Chemistry, Principles & Modern Applications” by R. Petrucci and W. Hardwood, 6th ed., Prentice Hall published

o

“Chemistry, A conceptual Approach” by C. Mortimer, 4th ed., D. Van Nostrand published.

Help is always available; you must seek them and make time for them.

CHEM 152 COURSE SCHEDULE (Spring 2011) Date

Lecture/ Lab

Topics/ Titles

1/24

Lecture 1

Course Introduction, Data Treatment and Error Analysis No lab until 2/1/11

1/31

Lecture 2

Error Analysis as Illustrated by an Experiment to Determine Gas Constant R

(Help Session at 5 pm in Lab Sci 300) 2/1 – 2/5

Do Exp. 1

ERROR ANALYSIS (Check-in)

2/7

Lecture 3

Introduction to Quantitative Analysis and Concentration of Solutions (Help Session at 5 pm in LS250)

2/8 – 2/12

Do Exp. 2

INTRODUCTION TO QUANTITATIVE ANALYSIS

2/14

Lecture 4

Introduction to Titration and pH of weak acid/weak base solutions (Help Session at 5 pm in LS250)

2/15 – 2/19

Do Exp.3

ACID-BASE EQUILIBRIUM I: Determining the % Purity of an Unknown

2/21

Lecture 5

Buffer Solutions and pH Titrations (Help Session at 5 pm in LS250)

2/22 – 2/26

Do Exp. 4

ACID-BASE EQUILIBRIUM II: Buffer Solutions and Titration Curves

2/28

Lecture 6

Solubility Equilibrium (Help Session at 5 pm in LS250)

3/1 – 3/5

Do Exp. 5

SOLUBILITY EQUILIBRIA: Determining Solubility Products

3/7

Lecture 7

Thermal Chemistry (Help Session at 5 pm in LS250)

3/8 – 3/12

Do Exp. 6

THERMOCHEMISTRY: Enthalpy of Reaction and Enthalpy of Formation

Spring Break 3/14 – 3/19 3/21

Lecture 8

Midterm Review (Help Session at 5 pm in LS250) No lab 3/22 – 3/26

3/23 (Wednesday), Midterm Exam (locations TBA)begins at 6:30 pm (Covering Exp 1 → 5) 3/28

Lecture 9

Introduction to Ion-Exchange Chromatography (Help Session at 5 pm)

3/29 – 4/2

Do Exp 7

CHROMATOGRAPHIC SEPARATIONS and spectrophotometry

4/4

Lecture 10

Concentration Cells (Help Session at 5 pm)

4/5 – 4/9

Do Exp.8

ELECTROCHEMISTRY I: Ferricyanide/Ferrocyanide Concentration Cell

4/11

Lecture 11

Potentiometric Titration (Help Session at 5 pm)

4/12 – 4/16

Do Exp.9

ELECTROCHEMISTRY II: A Redox Titration Curve

4/18

Lecture 12

Introduction to Kinetics (Help Session at 5 pm)

4/19 – 4/23

Do Exp.10

CHEMICAL KINETICS: Determining the Rates of … (Check-out)

4/25

Lecture 13

Final Review (No Help Session)

5/8 (Sunday), special Help Session at 4 pm – 6 pm in Louderman 458

5/9 (Monday), Final Exam (locations TBA) begins at 8 am (cumulative)