Tags: Petroleum Business PlanGood American History Research Paper TopicsAdolescent Identity Crisis EssayLaser Tag Business PlanEssay About Self ValuesAct Essay TopicsThe Word Essay Originally MeantEssay On The French Revolution
Using a clean stirring rod, place a crystal of salicylic acid into the first test tube. To each test tube add 1 drop of iron(III) chloride) solution.
INTRODUCTION Aspirin (acetylsalicylic acid) is a synthetic organic derived from salicylic acid.
Salicylic acid is a natural product found in the bark of the willow tree and was used by the ancient Greeks and Native Americans, among others, to counter fever and pain.
Make sure that the water bath is located directly under the hood at your lab bench. (NOTE: The hot water bath will be used again later in the procedure.) A.
After heating, turn the bunsen burner off and CAREFULLY remove the flask from the water bath (remember it is hot! Label your flask containing the reaction mixture and place it in an ice bath and cool until the crystallization of the aspirin appears complete (approx. If crystals do not appear, you can scratch the walls of the flask with a stirring rod to induce crystallization. Collect the solid aspirin using a Buchner funnel and filter paper as shown in Figure 2.
However, salicylic acid is bitter and irritates the stomach.
A German chemist named Felix Hoffman is credited with being the first to synthesize aspirin in 1897.After the reaction takes place, water is added to destroy the excess acetic anhydride and cause the product to crystallize.The aspirin is then collected, purified by recrystallization, and its melting temperature measured.Hoffman's father had severe arthritis but could not tolerate salicylic acid he was taking for pain relief.The name given for Hoffman's new compound was A-spirin.If you spill a lot of either of these, notify your instructor.). Using the graduated cylinder located under the hood, measure out 7.00 m L of acetic anhydride and add this to the flask.Transfer this to a 125 m L Erlenmeyer flask using a powder funnel. Be sure to do this in the hood and wearing your goggles.Rinse the filter flask with water and discard the rinse water into the waste container under the hood.) C.Place the aspirin onto a doubled piece of paper towel and set aside to dry while performing the qualitative analysis of the aspirin.SAFETY CONSIDERATIONS Wear goggles throughout this experiment.This experiment uses salicylic acid, acetic anhydride and phosphoric acid.