chemistry l
After Lab: A complete scientific report is required for each experiment. This will take the following format. You will be required to submit a hard copy the day when the experiment is completed (due date is provided at the end) Title. (0.5 points) The experiment should be given a clear title and the date of the experiment must be recorded at the top of each page. Purpose. (0.5 points) This section should only take a couple of sentences. State why this experiment will be performed and include any relevant background information such as techniques that will be employed. 6 Equation. (1 points) A balanced equations for reactions using structural, rather than formula, notations. Procedure. (2 points) Continuous prose, written in the past tense and the third person. See example below: “A solution of methyl-4-formylbenzoate (0. 3288 g, 2.003 mmol) in 95% ethanol (3.0 mL) was cooled in an ice bath and then NaBH4 (0.2292g, 6.059 mmol) was added in small portions over two minutes. The reaction mixture was stirred for 15 minutes while being cooled in the ice bath. TLC (ethyl acetate:hexane, 40:60, v/v) indicated that the reaction was complete. Water (10 mL) was added and the resulting mixture was stirred in the ice bath for an additional 2 minutes. The mixture was extracted with ether (2 x 15 mL) and the combined organic layers were washed with H2O (10 mL) and saturated NaCl solution (15 mL). The organic layer was dried (Na2SO4) and the solvent was removed using a hot water bath to give 0.1981 g (60%) of a white solid.” Baru, A. R.; Mohan, R. S. J. Chem. Educ. 2005, 82, 1674 Results. (3 points) The results are summarized in this section but the meaning of the data is not discussed here. Your raw data should be organized in a way easier for the reader to digest. For example: arrange your data in tables if at all possible. There are 3 main set of data I am interested in here: 2. Reaction progress data – IR of starting material and product 3. Purity data – experimental and literature melting points of product (sometimes starting material if the reaction did not work as plan). 4. Reaction Efficiency data – Mass of reagents, limiting reactant, theoretical mass, experimental mass, and percent yield. Discussion and Conclusion. (3 points) This section will require that you answer questions that relate to what the experimental data mean. Answer the questions with reference to your data and your observations even if they do not conform to what you would expect to happen. Explain why the problems or unexpected results occurred. This is the section where synthesis of ideas and concepts can take place. Comparison of your data with others in the lab is entirely appropriate, but other peoples’ work should always be given credit (i.e. reference them). Don’t draw conclusions that aren’t supported by the data. Most of the time conclusions in a well-written report should reflect back to the purpose of doing the experiment. Again, 3 main things are of interest here: 1) Did the reaction work? To answer, you compare the IR data of the starting material and product 2) How efficient was your reaction? To answer, you must discuss your experimental yield and what factors may affect it. An understanding of the assumption on which theoretical mass is predicated and reaction mechanism would provide useful insight here. 3) Was your product pure? In most lab, some post reaction purification was done, and the effectiveness of this process was carried. A comparison of both the literature reported melting point and the experimentally obtained will be helpful in arriving at an answer. Mechanism: (1.5 points) A detail step by step mechanism for all reactions is necessary. 7 Green questions: (0.5 points) What were the environmentally friendly aspects of the lab? What could be done to make it even more environmentally friendly? See the 12 principles of Green Chemistry, which be googled.
Collepals.com Plagiarism Free Papers
Are you looking for custom essay writing service or even dissertation writing services? Just request for our write my paper service, and we'll match you with the best essay writer in your subject! With an exceptional team of professional academic experts in a wide range of subjects, we can guarantee you an unrivaled quality of custom-written papers.
Get ZERO PLAGIARISM, HUMAN WRITTEN ESSAYS
Why Hire Collepals.com writers to do your paper?
Quality- We are experienced and have access to ample research materials.
We write plagiarism Free Content
Confidential- We never share or sell your personal information to third parties.
Support-Chat with us today! We are always waiting to answer all your questions.
