After the synthesis of aspirin, the product was recrystallized for purification to rid the product of impurities. A major impurity that could be found in the crude. The acetic anhydride and sulfuric acid can cause bad burns. Use them only in the hood and be sure the hood fan is on! Wear gloves when using these chemicals. Excess chemicals must be disposed of in the plastic tub of water. Show all calculations. grams of salicylic acid (C7H6O3) moles of salicylic acid Theoretical yield of aspirin in grams (C9H8O4) Actual yield of aspirin in grams (C9H8O4) Percent yield aspirin (C9H8O4) C7H6O3 C4H6O3 - C9H8O4 C2H4O2 Salicylic acid (138.13 g/mol) Aspirin (180.17 g/mol) CALCULATIONS : IRON (III) CHLORIDE TEST Test Tube # Color BEFORE adding iron(III) chloride Color. _oC CONCLUSIONS ABOUT PURITY OF ASPIRIN. B. After the flask has cooled for about 3 minutes, CAUTIOUSLY add 15 mL of room temperature water to the flask to facilitate the decomposition of the excess acetic anhydride. Swirl the flask to mix the contents.
Analyzing the Aspirin Quality A. The presence of unreacted salicylic acid in the synthesized aspirin can be detected with the iron(III) chloride test. 1. Add about 1 mL of deionized water to five clean 10-cm test tubes.
D. After the 10 minutes cooling on the lab bench, complete the crystallization by placing the beaker and contents in the ice bath. (Label your beaker!) Crystals should form. If an "oil" appears instead of a solid, reheat the beaker in the hot water bath until the oil disappears. How to do volumetric calculations for AQA AS chemistry, how to do volumetric calculations for Edexcel A level AS chemistry, how to do volumetric calculations. 5. Isolating The Product A. Collect the solid aspirin using a Buchner funnel and filter paper as shown in Figure 2. Be sure to seat the filter paper in the filter with a small amount of water. Record the melting temperature on the Data Sheet. 9. Calculating the Percent Yield of Aspirin A. Weigh the aspirin and calculate the theoretical (maximum) yield. Note: The acetic anhydride is in excess and the salicylic acid is the limiting reagent. _oC CONCLUSIONS ABOUT PURITY OF ASPIRIN. Chemistry 104: Synthesis of Aspirin INTRODUCTION Aspirin (acetylsalicylic acid) is a synthetic organic derived from salicylic acid. Salicylic acid is a natural. B. Measure the melting point range of your synthesized aspirin with the Meltemp Apparatus as demonstrated by your lab instructor and compare to the value for pure aspirin of 138-140 oC. Course Code. Title and Description. Unit. L.H. P.H. Course Status. CHE 127. Inorganic Chemistry I. Electronic configuration, periodicity and building up of the. This will convert the acetic anhydride to vinegar and dilute the sulfuric acid. If you spill a lot of either of these, notify your instructor. EXPERIMENTAL PROCEDURE FOR SYNTHESIS OF ASPIRIN 1. C. Place your aspirin in the jar labeled "Student Prep Aspirin". Chemistry 104: Synthesis of Aspirin Name _ Hood No. _ Date _ PUT ON YOUR CHEMICAL SPLASH -PROOF SAFETY GOGGLES! Lauren Ambrose Lauren Bacall Lauren Graham; Laurence Olivier Lauryn. Hill Lea Michele; LeAnn Rimes Lee Jones Lee Majors; Lee Thompson Young. When one compares the life of Buddha with the life of Jesus, one finds that the two share many things in common. This essay aims to compare and contrast the lives of Buddha1 and. 68 (1996 577-616. JSTOR. Web. 4 Jan. 2013. Make sure to: Provide advanced information for the book if it is available. Only include the URL if the source cannot be found easily. Innovation through a more streamlined Regulation on Veterinary Medicines. IFAH -Europe strives towards securing an innovative and competitive market place of widely accessible, safe and effective quality veterinary medicines. With the complexities of the current system, there is an inordinately high administrative burden for veterinary medicines which has contributed to a 20 drop in the innovation rate. Mar 2, 2017. Peel Hunt reissued an add rating and set a GBX 355 (4.32) price objective on shares of Polar Capital Holdings plc in a report on Monday. Motivation, Personality, and Well-being in Hobbyists and Artists. Researchers: Larry Z. Daily Rachel DiLima, Shepherd University. Perceptions of Athletes in the Media. Researcher: Beth Dietz, Miami University Perceptions of Athletes. Researcher: Beth Dietz, Miami University Self-Actualization and Secure Attachment. The elderly experience more depression and suicide than you might think. Forty percent of all suicide victims are adults over the age of 60. Older adults suffer more frequently from depression because of the frequent loss of loved ones and friends as they age. PUT ON YOUR CHEMICAL SPLASH -PROOF SAFETY GOGGLES! 2. Adding The Starting Materials A. Using a weigh boat, weigh out 5.00 g ( 0.01 g) of salicylic acid (C7H6O3). Transfer this to a 125 mL Erlenmeyer flask using a powder funnel.
Using a clean stirring rod, place a crystal of salicylic acid into the first test tube. In the second, place a crystal of powdered commercial aspirin, and in the third, place a crystal of your synthesized aspirin.
Quality Counts 2009 found that states are making considerable progress in the area of early-childhood education. For the first time, every state and the District of Columbia have aligned kindergarten learning expectations with elementary and secondary standards. This change was made in part to ease the burden on state respondents, while still providing timely and detailed information.
IRT works with the School of medicine community to create enterprise-class web-based applications serving the needs of researchers, clinicians, patients, students, educators, and the community. Our staff can work with you through a highly collaborative process to understand your specific needs and outline the best technology solution. To ensure the user selects a product category which exists.
(2) Except as otherwise provided in this section, a consumer credit reporting agency that receives a request by secure electronic method selected by the consumer credit reporting agency, telephone, or another means authorized by the consumer credit reporting agency from a consumer to temporarily lift a security freeze on a credit report pursuant to division (D) of.
Sometimes simple is good, but Im planning to add some more options and features for those of you who want more. If you want to share pictures of these handwriting worksheets in action, Id love to see them. Monthly Statements of General Fund Cash Receipts and Disbursements. Receive notification of new fiscal reports and analyses from the.