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Department of Chemistry CHEM-UA.126 General Chemistry II Laboratory Spring 2016 TEXT: Experiments in General Chemistry Part II, 2nd^ Edition by Barry Rugg & Victoria Russell INSTRUCTOR: Prof. Barry Rugg Office: 1001M Silver Hours: M: 10:30 – 12:
Course Schedule Week Exp. No. Title
Jan 2 6 Feb 1 1 CHECK-IN and Safety in the Chemistry Laboratory
Feb 2 Feb (^8 2) Intro/Review of the LabQuest ©^ Interface
Feb 9 Feb 1 5 -- No lab—President’s Day
Feb 16 Feb 22 (^4) Aspirin History, Chemistry, and Colorimetric Analysis
Feb 23
Feb 23
Feb 29 Feb 29
Molecular Bonding and Geometry (Take-home Lab) Properties of Solutions: Colligative Properties*
Mar 1 Mar (^7 6) Kinetics; Chemical Reaction Rates
Mar 8 Mar 2 1 7 Determining an Equilibrium Constant
Mar 14 Mar 20 -- (^) Spring Break
Mar 2 2 Mar 28 8 Le Châtelier's Principle
Mar 29 Apr (^4 9) Determining the Dissociation Constant of a Weak Acid
Apr 5 Apr 1 1 10 Titration of Acids and Bases
Apr 12 Apr (^18 11) Buffered Solutions; Designing Solutions to Resist Changes in pH
Apr 19 Apr 25 12 K (^) sp—Studying the Solubility of Insoluble Salts
April 2 6 May (^2 13) Oxidation and Reduction Potential of Metals and Metal-Ion Solutions
April 26 May 2 CHECK-OUT**
May 1 1 May (^17) Final Exam Week: Date and Room to be announced
Take Home Lab :
Week Exp. No. Title
Feb 23 Feb 29 3 Molecular Bonding and Geometry
Laboratories will be held in room 151 Brown. The take home labs are due in the laboratory class on the due dates. ****Students who do not check out will receive a grade of incomplete (I).*
General Information
Purpose: Chemistry is an experimental science. This means that, in general, chemical theories have followed observations made in the lab. Even the theoreticians are not happy unless their work agrees with experimental data. This is the importance of experiments to Chemistry.
Why is laboratory work important to you? In the lecture course, you will encounter a barrage of chemical facts and be exposed to a torrent of theories. You probably won't be able to just memorize all of it, and you certainly won't understand it unless you make connections between related facts and fit them to their underlying theory. The laboratory course is intended to help you to see the connections. You are not expected to repeat the great discoveries of science in a series of 4 1/4 hour lab sessions. However, by performing the assigned experiments, you will observe the phenomena that led to some of those discoveries. Hopefully, this will help you to understand the underlying chemistry, as it did for the original researchers. In the Chemistry Laboratory II course, you will be introduced to a number of techniques that will serve you well in the future. If you doubt that, stop and talk with me. I'm sure that we can find some relevance to you. Try to learn the techniques as well as you can. Your experimental results (i.e. GRADE) will depend on it. If you don't know how to do something, ask. The instructors are there to teach you what you don't know!
Many of the experiments will involve the use of computer- interfaced instruments. We have recently renovated our general chemistry laboratories and we have installed new upgraded computer equipment in order to shift the emphasis of the course from procedure to analysis. You will still need to learn good technique. You will still work with chemicals and laboratory apparatus. The computers will simply record data and allow you to examine it in ways that would be difficult or impossible with conventional methods. We hope that the new equipment will allow you to learn chemistry more effectively.
New Lab Manual and Web Site
The lab manual (cited above) is complimented by a web site specifically designed to provide help and support in preparation for each experiment. When you purchase the lab manual, you will be given an access code to set up a personal account at the new web site. Access codes are not reusable. Once you set up the account with user ID and password, this is all the information you will require to log on. You will have to provide your mother’s maiden name when you set the password. If you forget the password, it can be retrieved with your mother’s maiden name through an automated system. User ID, password and mother’s maiden name are all case sensitive and so be careful to record exactly how you set up your log on access.
Once you have access to the new web site you will find each experiment has a PowerPoint presentation (excluding the Safety in the Chemistry Laboratory (Experiment 1)). Each experiment has a drag-and-drop reinforcement activity. The reinforcement activity should be attempted after you read the Background Information for each experiment in the lab manual.
The Safety in the Chemistry Laboratory (Experiment 1) is accompanied by a 25 question test (found at the web site) using multiple choice, matching and true/false type questions. T h e r e a r e l i n k s t o 3 s a f e t y v i d e o s a t t h e W e b c o m s i t e ( a n d b e l o w ) t h a t s h o u l d b e v i e w e d p r i o r t o a t t e m p t i n g t h e o n - l i n e S a f e t y Q u i z. You must get at least 80% correct but you can take the test as many times as you like until you get 100% up until the deadline ( hours before the your scheduled time for Experiment 2). This grade is recorded as a full lab grade that will give everyone a nice start to your lab experience.
During the experiment, feel free to ask (reasonable) questions. It is a learning experience, not a test. It is probably best to ask an instructor your question since your classmates are no more experienced than you. You will work with a partner for all experiments.
Dry labbing (reporting data which you and your partner did not collect yourselves) is cheating and will be treated as such. If you are caught using data from another student, from another semester, or from your imagination, you will fail this course. I think it is only fair to point out that the laboratory is monitored by video equipment 24 hours a day (to protect the computers, of course).
SAFETY IS OF PARAMOUNT IMPORTANCE IN THE LABORATORY. If you do not follow the safety rules presented to you, you will be removed from the lab and you will lose credit for the experiment.
THERE WILL BE NO MAKEUP LABS. If you are too ill to attend lab, see a doctor or go to NYU Health Services. You are required to bring to me documentation that will verify your illness. The documentation must be on a physician's stationary and I may call for verification. Excused labs will not count when we evaluate your grade. Similarly, if you must miss a lab because of religious observance, you should provide some documentation to be excused. THERE WILL BE NO EXCEPTIONS TO THESE RULES.
IF YOU DO ANY UNAUTHORIZED EXPERIMENTATION, YOU WILL FAIL THE COURSE!!!
Required Materials:
- You will need certain items for this course:
- Everyone will be required to purchase disposable lab coats for use during the experiments. The chemistry stockroom will provide the lab coats for you (at cost). These coats will be disposed of after each experiment by the lab personnel.
- Appropriate, full coverage Safety goggles (available at the NYU Bookstore).
- Rubber gloves (disposable are available at the chemistry stockroom; reusable rubber gloves can be purchased in supermarkets).
- The required text is entitled Experiments in General Chemistry II, 2nd^ ed. by Barry Rugg and Victoria Russell
- Software called Logger Pro©^ is also required and is available for free download from the course NYU Classes site (PW = conservation)
- Lab Equipment Breakage: to cover replacement costs for laboratory supplies and equipment damaged due to accidents or misuse, all students taking a laboratory class are required to have an active Campus Cash account. I suggest at least $25 for breakage. The replacement fees for broken laboratory supplies and equipment can only be paid for using your Campus Cash card – We cannot accept cash, checks or credit cards.
- Clothing Lockers: Personal belongings are not permitted in the lab. Coats, book bags, purses, etc., will have to be placed in your hall locker. These lockers are located on the 4th floor of the Silver building. How to use the clothing lockers… a. Go to the locker with the number you have been assigned on the 4th floor. b. Place your items inside and close the door. c. On the keypad press C, then any 4 number combination you will remember then the key (lock button). The lock will engage. I suggest you take a picture of your locker as a record. d. To open the locker, simply repeat the earlier steps – Press C, then the same 4 number combination that you entered earlier, followed by the key (lock button). The lock will release. After you have removed your items, please leave the locker as it is, you do not need to re-engage the lock. e. Please note that once the lock engages it will only remain locked for 5 hours. You must return as soon as possible following your lab and reclaim your belongings. After 5 hours have passed the lock will disengage automatically and the contents will be accessible to anyone. f. Items left in a locker past their removal time are subject to removal and disposal. g. If your locker does not open the a stockroom person will be able to help you open your locker if you can prove it’s your locker (take a picture).
- Waste Minimization: In an effort to minimize costs and to minimize any environmental damage, we all will make a concerted effort to avoid wasting laboratory materials and to dispose of all chemicals and other materials properly. With this in mind, you must observe the following rules in the lab: a. When you obtain a reagent for use in an experiment, read the label on the bottle; make sure that the substance name, its chemical formula, and its concentration match those specified in the directions for the experiment. b. Take only the amount that you need, and DO NOT RETURN any reagent to the bottle c. Dispose of all materials into the proper waste container (again, read the labels). NOTHING WILL GO INTO THE SINKS. DISPOSABLE PIPETS, and (of course) BROKEN GLASS MUST be disposed of in the "Broken Glass" container (not the regular trash) with rubber gloves and disposable pipets. Liquid chemical waste from the experiments is disposed of in the designated waste drum in the center of the lab.
NYU CLASSES: In addition to the new web site described above, I make extensive use of the NYU Classes System which is used for communication with this rather large class. I will send emails to the class via NYU Classes so please check your emails daily. Not reading your email is no excuse for the lack of vital information. If you are registered for the course and not receiving email notifications the other students are getting, notify me immediately so that I can remedy the situation.
Finally: The lab reports have three parts, the pre-lab (to be completed on-line before the lab commences), the data and calculations and the post-lab. Since you will be working with a partner, you and your partner will have identical data. As stated above, you and your partner will work together to complete the post-lab sections of the experiment. You never work alone in this laboratory! If your partner is absent, we will assign someone to work with you. Since you will work closely with your partner, you will constantly be discussing the experiment as well as the required calculations.
In order to do a good job on the experiments, it is essential you come well prepared. Reading the experiment for the first time in lab will put you and your partner at a disadvantage and make it very difficult to complete the experiment on time. You are advised to use the new lab manual, use the new web site with learning objects and complete the pre-lab assignment as required before coming to lab. You may further prepare by reading and completing any post-lab questions you are able to do before arriving at the lab.
If you have any technical questions on the pre-lab, data section or post-lab assignments, you are encouraged to ask the professor or any of the instructors, many of whom will make themselves available to you if asked before your lab section meets.
Webcom : Starting this semester, all grades will be posted on Webcom Gradebook and not in NYU Classes. It is your responsibility to make sure the grades recorded in Webcom are correct and consistent with the graded lab reports returned to you.
Laboratory Grading Scheme:
pre-lab and lab reports 75% written final exam 25%
Each experiment is graded out of 100 points. Each Pre-Lab Assignment counts for 40 points, and the written lab portion for 60 points. This lab grade will be a part of your overall course grade. This lab grade will be incorporated in your final grade for the lecture and laboratory course and will be worth 25% of your final grade.
