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Unformatted text preview: Date Performed: 10/28/2010 Name: Allan Gibson Date Submitted: 11/4/2010 Partner Name: Patrick Mason I nstructor: Ahmad Adam Acid Base Titrations Objective To standardize a sodium hydroxide solution by its reaction with a hydrochloric acid solution of known concentration. To determine the molar mass of an unknown, monoprotic acid. To determine the percentage of acetylsalicylic acid in an aspirin tablet. Experimental Data Part A: Molarity of HCl: .200M Titration #1: Volume NaOH added= 22.00 mL Titration #2: Volume NaOH added= 21.50 mL Part B: 1 st Sample of Unknown Acids Mass= 1.00g 2 nd Sample of Unknown Acids Mass= 1.00g Titration #1: Volume NaOH added= 20.00 mL Titration #2: Volume NaOH added= 19.80 mL Part C: Mass of Aspirin Tablet= .465 g Volume of NaOH added= 7.0 mL Sample Calculation Part A: Formula to determine Molarity of NaOH= M HCl V HCl =M NaOH V NaOH 1) (.200 M)(25.0 mL HCl)=(M NaOH )(20.00 mL NaOH) M NaOH = .250 M 2) (.200 M)(25.0 mL HCl)=(M NaOH )(19.80 mL NaOH) M NaOH...
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