DOC PREVIEW
UCLA CHEM 14BL - Guidelines

This preview shows page 1 out of 4 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

AspirinCHEM14BL Fall 2006 Report Guidelines for Week 2 of the Aspirin Experiment (Analysis of Experiment) Pre-lab MUST be written inside your lab notebook (I) On-line Technique Videos For This Experiment Click on the title below to download the video (require Real Player) (1) Laboratory Safety (this video was shown on the first day of the lab) (2) Melting Point Determination If you have trouble downloading the videos, go to the following Web site and click on the appropriate title to download the video. http://oid.ucla.edu/Webcast/Chemistry/ Guides for Writing Lab Reports Theory on Acid-Base Indicators (II) Pre-lab Report Guidelines (Week 2 ONLY) IMPORTANT: Make sure that you follow the proper laboratory safety protocol (refer to the course syllabus) BEFORE going to the lab. A laboratory safety check will be conducted at the beginning of the lab. You will be dismissed from the laboratory if you do not have the proper safety protocol. Please also make sure that you show up to the lab on time. Any pre-lab reports that are NOT turned in within the first ten minutes of the lab section will not be accepted for grading. (i) Title (ii) Reference of procedures (iii) Introduction (iv) Procedures (flow chart format) (see 57 under week 2) Note: only construct procedural flowchart for “Titrimetric Analysis of the Acid in Aspirin” & “ Melting Point of Aspirin”. No need to construct procedural flowchart for “Mass Spectral Analysis”. No need to construct flow chart for procedures under “Week 3”CHEM14BL Fall 2006 Report Guidelines for Week 2 of the Aspirin Experiment (Analysis of Experiment) Pre-lab MUST be written inside your lab notebook (II) Pre-lab Report Guidelines (Week 2 ONLY) (v) MSDS information The following chemicals will require you to use the MSDS database on the Web (see Lecture Syllabus): Aspirin You should record the following MSDS information in your notebook for the chemicals listed above. Printouts directly from Web pages will NOT be accepted for grading. Important: Reference the site (i.e. write down the URL address) that you used for each of the chemical. (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)CHEM14BL Fall 2006 Report Guidelines for Week 2 of the Aspirin Experiment (Experiment 4b) Pre-lab Report MUST be written inside your lab notebook (II) Pre-lab Report Guidelines (Week 2 ONLY) (Continued) (vi) Pre-lab study questions (Must show all work for FULL credit) Complete ALL problems under week 2 only on p.56. (vii) Data/observations (start a new page for this section) 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 for this experiment.CHEM14BL Fall 2006 Post-lab Report Guidelines for Aspirin Experiment (Part 2) This is an INDIVIDUAL Report Post-lab report MUST be written inside your LAB NOTEBOOK (except for graphs). (A) Abstract - summarize results and outline the lab technique that you used in the lab to purify and analyze the final product. (B) Data / Observations (see p.59 under Analyses) - Orderly record of data - Data tables should have proper titles/labels (C) Data Analysis (MUST SHOW ALL WORK FOR FULL CREDIT) - Calculate the % recrystallized yield - Calculate the average % purity from all the trials of your titrations. (D) Error Analysis (MUST SHOW ALL WORK FOR FULL CREDIT) NOTE: Refer to chemistry 14BL lecture guide on errors propagation. You have also done the similar error analysis in your post-lab report for experiment #2 & part 1 of the acetic acid titration experiment. - Calculate the % inherent error in % purity for ONE of your trials. You Must identify each term in the error analysis. (E) Conclusions - summarize results (again) - Based on the value of the experimental melting point (as compare to literature value), what can you conclude in terms of the purity of the product? Explain. Note: Read pages 117-127 in “Techniques in Organic Chemistry by Mohrig and others” for concepts in melting point theory. - If your % purity is greater than 100%, explain why. - If your % purity is less than 50%, explain


View Full Document

UCLA CHEM 14BL - Guidelines

Documents in this Course
1-3

1-3

3 pages

Load more
Download Guidelines
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Guidelines and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Guidelines 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?