Analysis Of Aspirin Tablets

 Variables  

Independent – Mass of different brands of Aspirin tablets

-  Concentration of NaOH solution.            

Dependent    - Volume of the neutralized solution

                     - Time taken for Aspirin to dissolve in distilled water

                     

Controlled    - Same tablets

Apparatus used for the experiment were as follows

      - Conical flask

• Burette                        -Bunsen burner & Tripod stand  
• Motor and pestle         - Weighing Scale      

Materials used for the experiment

  - A standard solution of Sodium Hydroxide (NaOH)

  - 3 different Brands of Tablets

  - Phenolphthalein Indicator

 

 Procedure

• Choose a brand of tablet, note the brand and price per tablet and weight it.
• Crush tablet using motor and pestle and rinse the power using distilled water in a conical flask
• Add more distilled water until approximately 25 cubic cm.
• Warm the solution, so as the tablet dissolves faster.
•  Add 3-4 drops of phenolphthalein indicator.
• Titrate the Aspirin solution with 0.05mol per dm cube of NaOH
• And record the reading
• Repeat with another brand of tablet .      

Data collection

The result were obtained as follows,

 

Data Processing and presentation

 From the data obtained above , shows that 0.05molperdm cube and the volume titrated   of NaOH react with the aspirin solution to form a neutralization reaction .

Conclusion and Evaluation

Conclusion: - From the Observation of the resulting data, the percentage purity of the third tablet is greater than the other two tablets. This explains that the third tablet will be more effective than the others because of its having the maximum pure part of the compound that helps to cure the fever and pain. Thus representing the best value for money and worth purchasing.

 

 Evaluation: - Basically, my hypothesis showed itself to work well, the experiment was effective and a result we received the volume of the NaOH used of which we had to find the number of moles and then calculation the theoretical results, and using all the information we had to calculate the percentage purity that would determine which Aspirin tablet represent the best value for money.

   However I discovered that the result I got resembled with my partner and other students as well, therefore I was convinced that I was on the right track.

Improvements:

1: We could have performed few more tests with different amount of Aspirin tablets. However time was limited and we settled with a sensible result.

2: We could have made our work a bit fast so we could make further testing even though we had enough results we needed.

Manipulating skills:

We were carefully following every instruction given by the teacher on a piece of paper. We used the materials need in an amount that was needed and not wasting them by taking large amounts. And finish our experiment successfully with sensible results that would help us understand with out any damage .