Analytical Chemistry Laboratory

CHEMISTRY 313 Analytical Chemistry Laboratory Syllabus Fall 2011

Course Coordinator: Dr. Evans E-mail: [email protected] Telephone: 617-287-6149 Office hours: F 1:00-3:00 or by appointment Office: RM Science 1- 084 Class: Analytical Lab, CHEM 313

Discussion: Th 8:00-9:15 in M01-0409 (attendance mandatory!!!)

Lab sections: Section # Instructor Day and Time Rm # Section 1: Dr. Evans M 1:00-4:00 Science 2-047 Section 2: Dr. Qu Tu 12:30-4:30 Science 2-047 Section 3: Dr. Foster W 1 :00-4 :00 Science 2-047 TA: Katie Flanders Section 4: Dr. El-Hayek W 6:00-9:00 Science 2-047 TA: John Collins

Email addresses of Instructors and TAs Jason Evans [email protected] Deyang Qu [email protected] Michelle Foster [email protected] Rami El-Hayek [email protected] John Collins [email protected] Katie Flanders [email protected]

Objective: This course will focus on chemical techniques, both traditional wet chemistry approaches, such as titrations, and instrumental methods, that are applicable for the quantitative and qualitative analysis of a variety of different samples. Topics will include statistics, acid/base and redox, spectroscopy, and potentiometry. I hope you will enjoy the semester.

Text: Quantitative Chemical Analysis, 8th Edition by Harris

Lab Manual: Available on-line Grading:

Nine lab reports and spreadsheets; 100 pts each One PowerPoint Presentation; 100 pts Notebooks will be collected and graded twice, 200 pts; 100 pt each time Blackboard Final Exam based on the ten lab experiments, 200 pts

Grading Scale: Grade Points required to earn grade Corresponding Pecentage F <770 <55 % D- 770 55% D 812 58 % D+ 868 62% C- 910 65 % C 952 68 % C+ 1008 72 % B- 1064 76 % B 1106 79 % B+ 1162 83 % A- 1232 88 % A 1310 93 %

Attendance: You are expected to attend all discussion and labs. If you miss a discussion, you will not be permitted to perform the experiment. There will be no make up labs! If you miss a lab for any reason, you will be given data necessary to produce a lab report and you will take a 20 point penalty on your report for that experiment.

Lab reports: Much of your data manipulations will be performed on an Excel spreadsheet. If you are not already an expert, you will learn to be efficient at Excel during this course. Your reports are required to contain the following elements.

- A Word file including Abstract Procedure Data Tables and Graphs Answers to any questions Discussion

- An Excel template file containing your data and calculations. Each of the experiments will have an Excel spreadsheet template that you can download from the course webpage or Blackboard. All of you calculation must be done using Excel. Both the Excel file and the Word file should be named in the following format and uploaded onto Blackboard.

Last name first name sect# lab #

So, if you are in Tuesday’s lab section, your name was David Ortiz and you are attempting to upload lab report 5 you should upload two files named

OrtizDavidsect2lab5.doc and OrtizDavidsect2lab5.xls

How to write a good abstract: In a couple of sentences summarize your lab work. The abstract should be about five to ten sentences. Start with a sentence that outlines the goals of the experiment. Then give a sentence that outlines the strategy used to perform the experiment. Next report the results of the experiment. Qualify or quantify the significance of the results. What do your results mean? It should be written in the passive voice because, in science, the experimenter is immaterial. The experimental details and results are what is important. So, never use any pronouns. Also, do not waste words. For instance, “In this lab we……or the goal of this experiment was…..or we determined the…. Good science writing is written in relatively short, clear and concise sentences.

Here is an example of a well-written abstract for a General Chemistry experiment we do at UMB.

The density of small polystyrene balls was determined from using the volume measured in the previous week’s experiment and the mass of the ball. The precisions of four different strategies for obtaining the mass of the ball were measured and compared. It was found that measuring the mass of ten balls using an analytical balance provided the best precision in measuring the average mass of the polystyrene balls. The density was calculated to be 1.129 ± 0.006 g/mL by propagating the uncertainties in the average volume and mass of the polystyrene balls. The precision in the density was limited by the precision in the volume from the first laboratory experiment. This experiment provided a good framework for gaining a deeper understanding of the concepts of mass, volume, density, precision and error propagation.

Your report will be graded on the accuracy of the content, as well as the quality of your writing. A grading rubric is provided for each of experiment in the lab write-ups.

Final Exam (Blackboard) The final will consist of 16 multiple choice questions (two from each laboratory exercise) testing your conceptual understanding of the first eight experiments. It will be split into ten separate Blackboard Exams, one for each lab experiment. You will have a limited window (Dec. 1st-Dec. 15th) to take the exam. You will get 45 minutes to complete each exam (but it typically requires less than 15 min). You will need a calculator, the lab write-ups, your notebook, a pencil and plenty of paper to take the exam. No two students will be taking the same exact exam, so attempts at cheating will be futile. https://login.umassonline.net/boston.cfm

Lab schedule:

Sept 12-14 experiment 1 Introduction to stats and the t-table Sept 19-21 experiment 2 Statistical analysis of pennies Sept 26-28 experiment 3 Calibration of a Pipet Oct 3-5 experiment 4 Flagan’s Determination of Chloride Oct 17-19 experiment 5 Standardization of NaOH and analysis of vinegar

Oct 24-26 experiment 6 Solubility of CaSO4 Oct 31-Nov 2 experiment 7 pKa of Acid/base Indicators Nov 7-9 experiment 8 Spectroscopic Iron Analysis Nov 14-16 experiment 9 Instrumental Methods Nov 28-29 PowerPoint Talks Dec 5-7 PowerPoint Talks

Notebooks: You are required to keep a bound notebook for this course. The first page should be a table of contents. Entries for each experiment should be dated at the top, have a few sentences that describe the goal of the experiment, contain the tabulated data, and any calculations that were performed during the course of the experiment. Label everything neatly. Use blue of black ink ONLY! If you make a mistake in your notebook, DO NOT SCRIBBLE the mistake out. Simply put a single line through the entry. Your notebook will be collected and graded twice; before the halfway point and towards the end of the course.

Lab 9 Instrumental Methods and the PowerPoint presentations

Each lab section will split into four groups and each group will perform an experiment on an instrument such as a FTIR, HPLC, spectrofluorimeter and an atomic absorption spectrometer. The experiment will be assigned to you mid way through the semester. Your group will have to present the details of the experiment to the class in a PowerPoint Presentation. More on this as the semester develops.

Students with Disabilities: Section 504 of the Americans with Disabilities Act of 1990 offers guidelines for curriculum modifications and adaptations for students with documented disabilities. If applicable, students may obtain adaptation recommendations from the Ross Center for Disability Services, M-1-401, (617-287-7430). The student must present these recommendations and discuss them with each professor within a reasonable period, preferably by the end of Drop/Add period.

Academic dishonesty: Students are required to adhere to the University Policy on Academic Standards and Cheating, to the University Statement on Plagiarism and the Documentation of Written Work, and to the Code of Student Conduct as delineated in the catalog of Undergraduate Programs, pp. 44-45, and 48-52. The Code is available online at: http://www.umb.edu/student_services/student_rights/code_conduct.html.

You are expected to do your own work. It is OK to get help on a question from a classmate, but it is not OK to copy an answer off of a classmates report. If there is any question in your mind about whether or not the action you are about to undertake constitutes cheating, it likely does, and DO NOT PROCEED!! Come and at least check with me. If you do not heed this warning, you will likely be caught and you will FAIL the course and be DISMISSED from the university! It is just not worth it!!!