midtermreport - Mid-Term Practical Quantifying Aspirin...

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Mid-Term Practical – Quantifying Aspirin Author: Steven Hagedon Lab Partners: Practical Exam, solo; group partners: Danielle Nguyen, Ashley Cox, and Grishma Sheth Instructor: Yan Zhao Chemistry 104b – 027 Date Work Performed: March 11, 2008 Date Work Submitted: March 11, 2008 Abstract _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ ________________________________________________________
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_____________________________________________________________ Introduction The purpose of this practical mid-term exam is to determine the amount of aspirin contained within a commercial sample of aspirin. Another name for aspirin is acetylsalicylic acid, HC 9 H 7 O 4 In order to do this, a titration between a strong base, NaOH, and a solution containing distilled water and the dissolved aspirin. From the titration, it should be noted that at the equivalence point, where the color of the solution turns pink, the number of moles of NaOH would equal the number of moles of dissolved moles within the solution. However, in order to calculate the number of moles of NaOH, multiply the molarity of the NaOH by the number of liters of NaOH used to change the solution color. Each mole of NaOH neutralizes one mole
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