The aim of our experiment was to find the mass of acetyl salicylic acid in an aspirin tablet and compare it with the manufactures claim.

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Thomas Bishop                                                                                                            IB13VF

Chemistry Write up # 3:                

Analysis of Aspirin Tablets

Table showing masses and measurements of chemicals in the experiment

Observations:

  • When adding the sulphuric acid to the NaOH, indicator and salicylic acid during titration the colour changed from blue to yellow.
  • There was a strong smell when the aspirin and water was boiling.
  • The mixture in the volumetric flask still had solid clumps in it. This we discovered was part of the outside shell of the aspirin tablets.
  • A thin foamy layer formed on the meniscus of the mixture of the volumetric flask after it was left overnight
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Calculations:

CH3COOC6H4COOH (s)    +     2NaOH (aq)                 HOC6H4COONa (s)  +       H2O(aq)

Conclusion:

The aim of our experiment was to “find the mass of acetyl salicylic acid in an aspirin tablet and compare it with the manufactures claim.” The mass of acetyl salicylic acid the manufacture claims is in an aspirin tablet is 300mg. From our experiment we calculated that the mass of acetyl salicylic acid was 360mg. This was ...

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