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I.Spectrophotometric Analysis of Commercial AspirinII.AbstractHypothesis: A wave of light contains energy and can pass through some liquids. The amount of transmittance is dependent upon the density of the liquid.Procedure:The absorbance and transmittance of pure and commercial aspirin were determined by making a spectrophotometric analysis of the aspirin.The stock solutions used for this analysis were mixed together using a small amount of aspirin that was diluted in H2O.All absorbance and transmittance measurements of the solutions were recorded using a spectrophotometer in the wavelength of 530 nm. Six solutions were tested in the spectrophotometer to determine the absorbance and transmittance of the aspirin.Conclusion: This experiment does demonstrate Beer’s Law. The values of the absorbance in thisexperiment are proportional to the values of concentration in each solution. Therefore, the concentration increases as the absorbance increases.