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UCLA CHEM 30AL - Guidelines

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CHEM 30AL Summer 2005Online Resources and TutorialsSalicylic Acid, Sulfuric acid (concentrated), Acetic AnhydrideCHEM 30AL Summer 2005 Pre-lab Report Guideline for Aspirin Experiment (Part 1) The following guidelines are for week 1 of the experiment. Pre-lab Report is due at the BEGINNING of the lab section. Pre-lab report MUST be written inside your LAB NOTEBOOK. NO EXCEPTION! IMPORTANT: Make sure that you follow the proper laboratory safety protocol (refer to the course syllabus) BEFORE going to the lab. You will be dismissed from the laboratory if you do not follow the proper safety protocol. Online Resources and Tutorials History of Aspirin Techniques in Recrystallization (Real Player Video) Pre-Lab Report Guidelines (Week 1 ONLY) (i) Title of the experiment (ii) Reference of procedures (iii) Introduction (iv) Procedures for week 1 ONLY in flow chart format (v) MSDS information The following chemicals will require you to use the MSDS database on the Web (refer to either the lecture syllabus or the MSDS handout): Salicylic Acid, Sulfuric acid (concentrated), Acetic Anhydride You should record the following MSDS information in your notebook for the chemicals listed above. (Printouts directly from the Web pages will NOT be accepted!!) (a) Product Name (b) Chemical Formula (c) Formula Weight (d) Melting Point; Boiling Point and Density (e) Health Hazard Data (summarize in your own words) (f) Spill and Disposal procedures (summarize in your own words) (vi) Pre-lab report study questions (Must show all work for FULL credit) Complete ALL study problems under week 1. (vii) Data/observations (Start a NEW page) Set up tables but leave blank. You MUST record all the observations into your lab notebook during your lab sessions. You will NOT receive any credit for your lab technique if you only record the weight of the chemicals during the experiment.CHEM 30AL Summer 2005 Post-lab Report Guideline for Aspirin Experiment (Part 1) This is an INDIVIDUAL report Post-lab report MUST be written inside your LAB NOTEBOOK. (A) Abstract - summarize results and outline the lab technique that you used in the lab to synthesize and/or purify the final product. (B) Data/Observations (See p.94 under the section "Synthesis") - Orderly record of data - Data tables should have proper titles/labels - Documentation of ALL observations during the experiment (C) Data Analysis (MUST SHOW ALL WORK FOR FULL CREDIT) - Theoretical moles of Aspirin (MUST show all work. You MUST identify which one is the limiting reagent) - % Crude Yield - % Corrected Crude Yield (D) Conclusions - summarize results (again) and comments of any random errors or systematic errors that may affect the experimental results. - What can you conclude about the % crude yield (especially if the yield is greater than 100% or less than 50%)? Explain your reasoning of why that may


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UCLA CHEM 30AL - Guidelines

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