CHM 2354 Analytical Chemistry An introduction to fundamental principles of analytical chemistry, including analytical data, theory of acid-base and redox titrations, and separation schemes. Buffer solutions and precipitation equilibria.

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1st Report:

The purpose of this experiment was to determine the amount of acetylsalicylic acid contained in an aspirin tablet as a percent-weight concentration. To do this we titrated two acetyl salicylate solutions (one solution made using dissolved aspirin tablets in NaOH and the other using aspirin powder dissolved in NaOH) with standardized HCl. Using the data collected during these titrations, it can be calculated that each tablet contains approximately 80% acetylsalicylic acid. Determining that each tablet contains a high concentration of acetylsalicylic acid is important because the main beneficial properties of aspirin are caused by the presence of acetylsalicylic acid. 

2nd Report:

In this experiment we determined the amount of acetyl salicylic acid (ASA) in aspirin tablets. The tablets were dissolved in NaOH and then the resulting solution was analyzed by back titrating the excess NaOH with HCl. The results that we determined for this lab was that there was between 350-360mg ASA/tablet or a percent weight of ASA of between 84-86%. ASA is the main pharmaceutical ingredient in the Aspirin tablets. It is important to know how much ASA is in each tablet because if there is too little, the tablets will not be as effective as they were intended to be and if there is too much ASA, the tablets could be harmful to your body 

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