G Determination of the Percentage of Acetylsalicyl…


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20.50

G Determination of the Percentage of Acetylsalicylic Acid in an Aspirin Tablet 1. From F, the concentration of tetraaquasalicylatoiron (III) in the dilute solution was 5.5 x 10-4 mol/L-1 2. The concentration of the dianion of salicylic acid in the 100 mL sodium hydroxide stock solution was 5.5 x 10-4 mol/L-1 x 0.100L = 5.5 x 10-5 mol/L-1 / 0.012L = 4.583 x 10-3 mol/L-1 3. The number of moles of the dianion of salicylic acid in the 100 mL sodium hydroxide stock solution was 4.583 x 10-3 mol/L-1x 0.100L = 4.583 x 10-4 moles 4. The number of moles of acetylsalicylic acid initially present and therefore also in the aspirin tablet was 5. The mass of acetylsalicylic acid in the aspirin tablet was 6. The percentage of acetylsalicylic acid in the aspirin tablet was

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20.50