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ChemLab113-0003 - INTRODUCTION The introductory chemistry...

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Unformatted text preview: INTRODUCTION The introductory chemistry laboratory at almost any college or university must serve two kinds of students. To some, this is the first of several college chemistry lab courses; to others it is the only: chemistry lab to be taken at the university level. We have the obligation to prepare the first group for more advanced labs. For the latter group, we must emphasize those aspects of chemistry lab operations that apply to a wide range of technical fields. Chemistry 113 serves both groups by focusing upon high quality experimental lab results and critical analysis. Special emphasis is placed on quantitative measurements and reasoning. Computers play a particularly important role in Chemisn'y 113, reflective of the role they play in modern research chemistry labs. You will use a computer to collect data, carry out calculations, report results and evaluate those results. Computers are time- and labor-saving devices. They should not be used as thought—saving devices. Therefore, whenever you work with a computer to do an experiment, you will be expected to understand how the data is collected, what calculations are performed and what results are reported. You must also be aware of what criteria are used in evaluating the results. You should be able to calculate these results on your own (i.e. without the computer) with the help of a calculator. To obtain good results in the lab you must be well prepared, well organized, and you must pay careful attention to detail. This manual is designed to give you maximum assistance in tampering and organizing your lab work. In addition, a faculty instructor and a graduate student teaching assistant will be present in the lab to assist you when necessary. Weekly lectures are intended to help you develop reasoning skills in connection with the experiments. They cover background material for the coming experiment and sample exam questions for the previous experiment. The background, which is also covered in the manual Introduction to each experiment, gives you a critical appreciation of the experimental procedures. The sample questions, which are given in the manual at the end of each experiment, illustrate the kinds of things you need to know and to be able to do upon completion of each experiment. TWO special sections, accompanied by sample questions, precede the first experiment. There are nine experiments divided into three blocks. Block I consists of three experiments that expose you to a common type of quantitative analysis. - Block H contains four experiments based on chemical syntheses. Block Ill includes two physical chemistry experiments. You will submit a lab report for each of the three blocks. The report will be submitted in sections. Each section will consist of computer printouts and pages taken from this manual and from the lab notebook, as described in the next section of this manual. A schedule of experiments for the course is on the following page. The course webpage has a variety of things that you may find usefiil, or even amusing. Find it and check it out. ...
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