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Re-crystallization Lab Report

June 22, 2015 0 Comment

Paper, Order, or Assignment Requirements


Answer the questions asked and do the report in the format below: Format of Laboratory Report: Your laboratory report should be divided into the following sections: I. Introduction A brief statement of the purpose of the experiment. This is also a good place to show relevant structures and chemical equations. II. Experimental Procedure A brief outline of the experimental procedure. Be particular about reporting the amounts of materials used and any modifications made to the original procedure (avoid simply copying the original procedure). III. Results and Discussion This section is the most important. Include observations such as appearance of the reaction, color of product, etc. If the experiment was a preparative one, you should also report your percent yield: Show all of your calculations !Graphs should be done on graph paper. Note: Our lab manual contains a “Data Report Sheet” for each experiment. You may record your results here and include this sheet at this stage of your report. The discussion part comes from you! Were your results what you expected? If, not, can you suggest reasons why not? If you took a melting point of a compound you synthesized, what is the true, CORRECT:It was determined that … This style of writing may seem awkward sometimes, but this is the proper form for writing reports. You will find it used extensively in articles and research papers in the scientific literatureJI N CORRECT:We determined that …LCORRECT:The instructor indicated that … JINCORRECT: You told me that …LCORRECT:Ten grams of NaCl were added to … JIN CORRECT:Iadded 10 g of NaCl to …Lor “literature” melting point? How well does your melting point compare? What does your melting point indicate about the purity of your compound? Assume that your reader is not entirely familiar with the experiment, so you need to explain clearly. IV. Conclusions Your overall evaluation of your results. This is a good place to mention any modifications to the procedure which you feel might improve the outcome of the experiment .V. Answers to Exercises These questions appear at the end of each experiment in the laboratory manualor handout. You should type your report using one side of the paper only. Always use complete sentences. Try your best to avoid spelling and grammatical errors. Write your report in impersonal form. The words “I” or “we” should not appear in your report. The following examples show some incorrect phrases and how they can be revised to avoid the personal form:

Write the QUESTIONS that are in the scanned document and ANSWER them. Also complete all that says complete




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