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| Analysis of Aspirin by Acid-Base Titration |
xound |
01/10/08 |
A 0.5130 g aspirin tablet which was dissolved in 95% ethanol required 27.98 mL of 0.1000 M NaOH for neutralization. Then an additional 42.78 mL of 0.1000 M NaOH was added and the solution was heated to hydrolyze the acetylsalicylic acid. After the reaction mixture was cooled, the excess base was back-titrated with 14.29 mL of 0.1056 M HCl. How many grams of acetylsalicylic acid are in the tablet? What % w/w of the tablet is acetylsalicylic acid?
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